Search

Background: Oxygen uptake (V̇O2) and heart rate (HR) kinetics during a constant work-rate test (CWRT) are used to evaluate the response to exercise in healthy subjects as well as subjects with various pathologies. Objectives: This study aimed to explore the feasibility of these measures and their responsiveness to a prehabilitation program in patients with non-small cell lung cancer (NSCLC). Method: This study is preregistered (NCT04041297) ancillary analysis of a subgroup of individuals with NSCLC included in the Preo-Dens study (NCT03936764). Thirty individuals performed a moderate-CWRT before and after a 15-session prehabilitation program between July 2019 and April 2021. V̇O2 and HR on-kinetics were extracted from the first 240 s of breath-by-breath data using Box-Jenkins transfer functions. Results: Pre/post V̇O2 on-kinetic feature values were reliable for 25/30 participants, and pre/post HR kinetic feature values were reliable for 19/30. V̇O2 time constant (τ) and mean response time reduced from pre-post prehabilitation (mean difference −7.8 s; 95% CI: −14.6 to −1.0, and −8.4 s; 95% CI: −14.7 to −2.0, respectively). For HR on-kinetics, τ did not change from pre-post prehabilitation (median difference −4.0 s; 95% CI: −36.0 to +11.0). V̇O2 and HR response amplitudes reduced significatively from pre-post prehabilitation (mean difference −38.6 mL/min; 95% CI: −73.3 to −3.9, and −3.1 beats/min; 95% CI: −6.4 to −0.2, respectively). Conclusion: V̇O2 on-kinetic analysis during moderate-CWRT is feasible in individuals with scheduled NSCLC resection, and results are responsive to prehabilitation. These results support a true speeding of the adaptation of aerobic metabolism after a 15-session prehabilitation program.

How well do the 6-minute stepper test (6MST) and sit-to-stand test (STST) predict complications after minimally invasive lung cancer resection? Do the 6MST and STST provide supplementary information on the risk of postoperative complications in addition to the prognostic variables that are currently used, such as age and the American Society of Anesthesiology (ASA) score?Prospective inception cohort study with follow-up for 90 days.Consecutive sample of adults undergoing major lung resection with video-assisted thoracic surgery (VATS) or robot-assisted thoracic surgery (RATS).Patients had a preoperative functional evaluation with the 6MST and STST. The number of steps, heart rate change, saturation and dyspnoea during the 6MST and the number of lifts during the STST were recorded. Complications graded ≥ 2 on the Clavien-Dindo classification were recorded for 90 days after surgery.Between November 2018 and November 2019, 118 patients with a mean age of 65 years (SD 9) were included and analysed. Their surgeries were via VATS in 88 (75%) and via RATS in 30 (25%). For predicting a postoperative complication graded ≥ 2 on the Clavien-Dindo classification, the area under the Receiver Operating Characteristic curve was: 0.82 (95% CI 0.75 to 0.90) for the number of steps during the 6MST, with an optimum cut-off of 140 steps; and 0.85 (95% CI 0.77 to 0.93) for the number of lifts during the STST, with an optimum cut-off of 20 lifts.The 6MST and STST predicted morbidity and mortality after lung cancer resection via minimally invasive surgery. The preoperative use of these exercise tests in clinical practice may be useful for risk stratification.NCT03824977.

International audience; Question: In people with non-small cell lung cancer, what is the effect of condensing 15 prehabilitation sessions into a 3-week regimen compared with a 5-week regimen?Design: Randomised controlled trial with concealed allocation, intention-to-treat analysis and blinded assessment of the primary outcome.Participants: People with diagnosed or suspected non-small cell lung cancer and moderate-to-high risk of postoperative complications. Intervention: Fifteen supervised prehabilitation sessions delivered with either a dense regimen of five sessions/week for 3 weeks (experimental group) or a non-dense regimen of three sessions/week for 5 weeks (control group).Outcome measures: The primary outcome was the change in cardiorespiratory fitness measured by the V̇O2peak in ml/kg/min. The secondary outcomes were the change in other variables of interest measured during cardiopulmonary exercise testing, non-invasive nutritional markers, quadriceps maximal voluntary isometric contractions, maximal inspiratory pressure, quality of life, adherence and postoperative complications.Results: Changes with the experimental regimen were similar to or better than changes with the control regimen for: V̇O2peak (MD 1.2 ml/kg/min, 95% CI −0.1 to 2.6); V̇E/V̇CO2 slope (MD −3.6 points, 95% CI −8.7 to 1.5); and work rate at ventilatory threshold (MD 3.7 W, 95% CI −5.6 to 13.0). The two regimens had similar effects on: peak work rate (MD 1.3 W, 95% CI −6.4 to 9.0), V̇O2 at ventilatory threshold (MD 0.0 ml/kg/min, 95% CI −1.4 to 1.4); body mass index (MD −0.2 kg/m2, 95% CI −0.5 to 0.1); and maximal inspiratory pressure (MD −0.7 cmH2O, 95% CI −9.8 to 8.4). The relative effect was uncertain for quadriceps maximal voluntary isometric contractions, quality of life and complications.Conclusion: Condensing prehabilitation sessions led to similar or better improvement in cardiorespiratory fitness and did not decrease adherence or increase adverse events. This could increase the number of patients who can be referred for prehabilitation, despite short presurgical periods. Trial registration: NCT03936764.

Background Pulmonary rehabilitation (PR) (primarily composed of an exercise training program (ET) and educational workshops) is an effective intervention for patients with chronic obstructive pulmonary disease. Although factors which influence participation in the full PR program have been reported, specific data on the educational component of PR have not been published. We aimed to identify factors which predict refusal to participate in the educational component of PR. Research design and methods 201 patient charts were retrospectively included in the analysis. Patients were classified according to their acceptance or refusal to participate in the educational workshops. Results The location of ET outside the center was independently related to refusal to participate in the educational workshops (OR =0.01 [95%CI 0.00 to 0.17]). Patients who refused the workshops were less disabled according to the number of prescriptions of non-invasive ventilation, oxygen consumption and workload achieved during cardiopulmonary exercise testing, and use of medical transport. Conclusions The location of exercise sessions during PR influences patients' decisions to refuse or accept center-based educational workshops. When center-based PR programs are limited, and the ET is relocated to the patient's home, the educational workshops should also be relocated. Trial registration The trial is registered at ClinicalTrials.gov (NCT04301245).

IntroductionExercise training before lung resection for non-small cell lung cancer is believed to decrease postoperative complications (POC) by improving cardiorespiratory fitness. However, this intervention lacks a strong evidence base.AimTo assess the effectiveness of preoperative exercise training compared with usual care on POC and other secondary outcomes in patients with scheduled lung resection.MethodsA systematic search of randomised trials was conducted by two authors. Meta-analysis was performed, and the effect of exercise training was estimated by risk ratios (RR) and mean differences, with their CIs. Clinical usefulness was estimated according to minimal important difference values (MID).ResultsFourteen studies involving 791 participants were included. Compared with usual care, exercise training reduced overall POC (10 studies, 617 participants, RR 0.58, 95% CI 0.45 to 0.75) and clinically relevant POC (4 studies, 302 participants, Clavien-Dindo score ≥2 RR 0.42, 95% CI 0.25 to 0.69). The estimate of the effect of exercise training on mortality was very imprecise (6 studies, 456 participants, RR 0.66, 95% CI 0.20 to 2.22). The main risks of bias were a lack of participant blinding and selective reporting. Exercise training appeared to improve exercise capacity, pulmonary function and also quality of life and depression, although the clinical usefulness of the changes was unclear. The quality of the evidence was graded for each outcome.ConclusionPreoperative exercise training leads to a worthwhile reduction in postoperative complications. These estimates were both accurate and large enough to make recommendations for clinical practice.

No abstract available

The coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) which is responsible for the current pandemic and results in a large number of hospitalizations. This highly contagious disease causes severe acute respiratory infection; thus, many patients require management in intensive care. At a time when there is a high influx of patients with COVID-19 in Intensive Care Units (ICU) all over the world, there is little literature concerning the physiotherapy management of these patients. This article provides information based on the latest evidence to help physiotherapists optimize care, to protect patients and care providers in the ICU, and for follow-up care.

BACKGROUND: Oxygen uptake (V̇O2) kinetics have been shown to be slowed in adolescents with cystic fibrosis (CF) during heavy-intensity cycling and maximal exercise testing. OBJECTIVES: This study investigated V̇O2 kinetics in adolescents with CF compared to control adolescents (CON) during a treadmill-walking exercise. METHODS: Eight adolescents with CF and mild-to-moderate pulmonary obstruction (5 girls; 13.1 ± 2.5 years; FEV1 67.8 ± 21.4%) and 18 CON adolescents (10 girls; 13.8 ± 1.8 years) were recruited. Pulmonary gas exchange and ventilation were measured during a single transition of 10 min of treadmill walking and a 5 min seated recovery period. Participant's walking speed was determined during a one-minute self-paced walking task along a 50-m corridor. A six-parameter, non-linear regression model was used to describe the changes in V̇O2 function during the treadmill walking and recovery, with monoexponential curve fitting used to describe the mean response time (MRT1) at the onset of exercise, and the half-life (T1/2V̇O2) at the offset of exercise. V̇O2 baseline and amplitude, minute ventilation and respiratory equivalents were recorded. RESULTS: V̇O2 kinetics were slower in CF group compared to CON group during the treadmill walking with a greater MRT1 (32 ± 14 s vs 21 ± 16 s; p = .04, effect size = 0.75). The T1/2V̇O2 was prolonged during recovery in CF group compared to CON group (86 ± 24 s vs 56 ± 22 s; p = .04, effect size = 1.31). The mean VE/V̇CO2 during exercise was the only parameter significantly greater in CF group compared to CON group (32.9 ± 2.3 vs 29.0 ± 2.4; p < .01, effect size = 1.66). CONCLUSION: V̇O2 kinetics were found to be slowed in adolescents with CF during treadmill walking.

TO THE EDITOR, Chronic respiratory diseases (CRD) progressively lead to physical inactivity and worsening dyspnoea, and cause disability and mortality. [...]

Accurate testing of muscle function is essential in individuals with cystic fibrosis (CF). A literature search was conducted in MEDLINE, CENTRAL, CINAHL, PEDro, ScienceDirect and Web of Science according to PRISMA and COSMIN guidelines from inception to September 2019 to investigate the clinimetric properties of muscle tests in individuals with CF. The search identified 37 studies (1310 individuals) and 34 different muscle tests. Maximal inspiratory pressure, inspiratory work capacity and quadriceps strength measured by computerised dynamometry were identified as reliable tests of muscle function. The one-minute sit-to-stand test was found to have high reliability but its validity to measure quadriceps strength is unknown. The clinimetric properties of other routinely used tests have not been reported in people with CF. Very different measurement procedures were identified. Inspiratory muscle and quadriceps testing can be considered as reliable but high-quality studies evaluating tests of other muscles function (e.g. muscle endurance) are lacking.

BackgroundThoracic surgery is the optimal treatment for early-stage lung cancer, but there is a high risk of postoperative morbidity. Therefore, it is necessary to evaluate patients’ preoperative general condition and cardiorespiratory capacity to determine the risk of postoperative complications. The objective of this study was to assess whether the stair-climbing test could be used in the preoperative evaluation of lung resection patients to predict postoperative morbidity following thoracic surgery.MethodsWe performed a systematic review and a meta-analysis on the association between stair-climbing test result and morbidity/mortality after thoracic surgery. We analysed all articles published until May 2020 in the following databases: Pubmed/Medline, Pedro, The Cochrane library, Embase and CINAHL. The risk of bias was assessed using the Quality in Prognosis Studies tool. This meta-analysis is registered as PROSPERO CRD42019121348.Results13 articles were included in the systematic review for a total of 2038 patients and 6 in the meta-analysis. There were multiple test evaluation criteria: rise time, height, desaturation and heart rate change. For the meta-analysis, we were able to pool data on the height of rise at a variable threshold: risk ratio 2.34 (95% CI 1.59 to 3.43) with I²=53% (p=0.06). The threshold for occurrence of complications was estimated at a 10 m climb.ConclusionsOur results indicate that the stair-climbing test could be used as a first-line functional screening test to predict postoperative morbidity following thoracic surgery and that patients with a poor test result (

Purpose Cognitive dysfunction is a common impairment associated with COPD. However, little is known about 1) its prevalence among those subjects referred for pulmonary rehabilitation (PR), 2) how it may affect the benefit of PR, 3) whether PR improves cognitive function and 4) whether cognitive dysfunction affects the usability of telehealth technology usually used to deliver in-home PR. Patients and Methods Fifty-six subjects with stable COPD (54% females, mean age 62 years (SD 9) and median FEV1 0.9 L (IQR 0.7 to 1.1)) participated in this multicenter observational study and performed 24 sessions of PR. The Montreal Cognitive Assessment tool (MoCA) was used to assess the occurrence of mild cognitive dysfunction (using a screening cutoff

Rationale Several studies have evaluated the effect of nasal high flow (NHF) to enhance exercise performance and tolerance in patients with COPD, however results are disparate. Objective The aim of this systematic review and meta-analysis was to assess the effect of NHF as an adjuvant to exercise training on functional exercise capacity in patients with COPD. Method An electronic search was carried out in the following databases: Pubmed, CENTRAL, PEDro, ScienceDirect, Web of Science, OpenGrey, ClinicalTrials.gov, European Respiratory Society and American Thoracic Society databases. Two authors independently selected relevant randomized trials (parallel group or cross-over design), extracted data, assessed the risk of bias and rated the quality of the evidence. Results Eleven studies were included, involving 408 participants (8 full papers and 3 conference abstracts). Most studies had a high risk of bias or other methodological limitations. The use of NHF during a single session increased functional exercise capacity (SMD 0.36 (95% CI 0.03 to 0.69) p=0.03, heterogeneity (I² 83 %)). When conference abstracts were included in the pooled analysis, the estimated effect did not change (p=0.006). The use of NHF throughout a pulmonary rehabilitation programme (parallel group RCTs) increased functional exercise capacity at 4 to 12 weeks compared with those who trained without NHF (SMD 0.34 (95% CI 0.00 to 0.68) p=0.05, heterogeneity (I² 18%)). Conclusion There is very low to low quality evidence that NHF improves functional exercise capacity. Patient responses to NHF therapy were highly variable and heterogeneous, with benefits ranging from clinically trivial to worthwhile. Registration (www.crd.york.ac.uk/prospero: CRD42021221550).

Background: Exercise training is a cornerstone of care for people with cystic fibrosis (pwCF); it improves exercise capacity and health-related physical fitness, but no meta-analysis has investigated its effects on muscle function in young pwCF. The objective of this meta-analysis was to assess the effects of exercise on peripheral muscle strength in young pwCF. Methods: An electronic search was conducted in four databases (Pubmed, Science Direct, CENTRAL, and PEDRO) from their inception to July 2022. Grey literature databases (OpenGrey, the European Respiratory Society, the American Thoracic Society, and the European Cystic Fibrosis Society) were also consulted. Randomized controlled trials comparing any type of exercise with standard care in young pwCF (5 to 19 years old) were included. Two authors independently selected the relevant studies, extracted the data, assessed the risk of bias (using the Rob2 tool), and rated the quality of the evidence. Results: Ten studies met the inclusion criteria, involving 359 pwCF. Exercise training improved both lower and upper limb muscle strength (SMD 1.67 (95%CI 0.80 to 2.53), I2 = 76%, p < 0.001 and SMD 1.30 (95%CI 0.66 to 1.93), I2 = 62%, p < 0.001, respectively). Improvements were also reported in muscle mass and maximal oxygen consumption. Results regarding physical activity levels were inconclusive. The overall risk of bias for the primary outcome was high. Conclusions: Exercise training may have a positive effect on peripheral muscle strength in young pwCF. The evidence quality is very low and the level of certainty is poor. There is a need for high-quality randomized controlled studies to confirm these results.

Riassunto Le patologie respiratorie ostruttive sono un importante campo di intervento del fisioterapista nel campo della pneumologia. La broncopneumopatia cronica ostruttiva (BPCO), la fibrosi cistica, la dilatazione dei bronchi (esclusa la fibrosi cistica) o, ancora, l’asma fanno, cosi, parte delle patologie per le quali il fisioterapista occupa un posto fondamentale nell’implementazione delle diverse terapie accanto agli altri professionisti sanitari che gravitano intorno a questi pazienti. La riabilitazione respiratoria costituisce, attualmente, un trattamento di riferimento per questi disturbi ventilatori ostruttivi ed e suddivisa in diverse aree di intervento: svezzamento dal fumo, riqualificazione allo sforzo (con o senza adiuvanti), promozione dell’attivita fisica, ginnastica ed educazione terapeutica (assunzione di trattamenti, supporto nutrizionale). Il fisioterapista occupa un posto importante in queste diverse modalita e puo anche proporre altre terapie specifiche in funzione della natura del disturbo ostruttivo, come il disingombro bronchiale nella fibrosi cistica o gli esercizi respiratori nell’asma. Attraverso questi interventi, il fisioterapista contribuisce all’aumento delle capacita di sforzo dei pazienti e al miglioramento della loro qualita di vita.

There is a growing body of evidence supporting the use of nasal high flow (NHF) to treat acute respiratory failure, particularly in Chronic Obstructive Pulmonary Disease (COPD) patients. Conversely, there are sparse data evaluating its effects in stable COPD patients.We identified randomized controlled trial comparing the effects of delivering air or oxygen

Resumen Las patologias respiratorias obstructivas son un importante campo de intervencion para los kinesiterapeutas en neumologia. La enfermedad pulmonar obstructiva cronica (EPOC), la mucoviscidosis, la dilatacion bronquial (sin relacion con la mucoviscidosis) y el asma son algunas de las enfermedades en las que el kinesiterapeuta es el protagonista de la implementacion de diversos tratamientos junto a los demas profesionales de la salud que se ocupan de la atencion de estos pacientes. La rehabilitacion respiratoria es actualmente un tratamiento de referencia para estos trastornos ventilatorios obstructivos y se divide en varias areas de intervencion: abandono del habito de fumar, reentrenamiento al esfuerzo (con o sin adyuvantes), estimulacion de la actividad fisica, gimnasia y educacion terapeutica (toma de medicamentos, apoyo nutricional). El kinesiterapeuta ocupa un lugar importante en estas diferentes modalidades y tambien puede ofrecer otras terapias especificas en funcion de la naturaleza del trastorno obstructivo, como el drenaje bronquial en la mucoviscidosis o los ejercicios respiratorios en el asma. A traves de estas intervenciones, el kinesiterapeuta contribuye a aumentar la capacidad para el esfuerzo y a mejorar la calidad de vida de los pacientes.

Background and objective We hypothesized that by reducing respiratory work and improving gas exchange, nasal high flow (NHF) would improve exercise tolerance in patients with chronic obstructive pulmonary disease (COPD) following respiratory exacerbation. Methods This was a monocentric, randomized, controlled crossover study. Patients with severe to very severe COPD carried out two high-intensity constant work-rate exercise tests (CWRET) with and without NHF on two consecutive days. The primary outcome was the mean difference in endurance time between both conditions. The secondary aims included vastus lateralis oxygenation (StO2 ), dyspnoea, leg discomfort, maximal inspiratory pressure (MIP), transcutaneous CO2 pressure (PtcCO2 ), respiratory rate (RR), heart rate (HR) and pulsed O2 saturation (SpO2 ), as well as the patients' opinions of the device. Results A total of 19 patients were included (mean forced expiratory volume in 1 s = 28.7 ± 10.8%, age = 62.1 ± 9.1 years). No significant differences in endurance time during the CWRET were found between the two test conditions (-66.58 (95% CI: -155.9 to 22.7) s, P = 0.12). StO2 , PtCO2 and HR were reduced at the end of the exercise with NHF (-2.1% (95% CI: -4.3 to -0.0); -1.3 mm Hg (95% CI: -2.5 to -0.2); -2.7 bpm (95% CI: -5.0 to -0.5), respectively, P ≤ 0.05). No significant differences were found for any of the other secondary outcomes. Half of the patients evaluated the device as being moderately to very uncomfortable. Conclusion NHF during exercise did not increase endurance time in patients with COPD following exacerbation. Clinical trial registration NCT03058081 at clinicaltrials.gov.

Early diagnosis of COPD exacerbations is vital. Exacerbations are characterised by an increase in dyspnoea that could be affect physical capacity. Changes in the physical capacity of patien...

We previously showed that functional electrical stimulation during cycle ergometry (FES-cycling) increased oxygen consumption (VO2), indicating that metabolism during exercise was increased. Howeve...

Questions: Can people referred to pulmonary rehabilitation easily learn to use a system for remote transmission of oximetry data? Do they consider remote transmission of oximetry data to be satisfactory? Are the transmitted data valid compared with locally stored data? Design: Multicentre, prospective, observational study. Participants: One hundred and five adults with chronic respiratory disease who were referred to pulmonary rehabilitation. Intervention: At an initial session, participants were taught to record and transmit their oximetry data to a remote server. At subsequent testing session(s), participants were requested to independently activate and use the oximetry monitoring system for a period of exercise on a cycle ergometer, until autonomy with the system was demonstrated. A subgroup of five participants undertook five 45-minute training sessions to generate a dataset to assess whether the transmitted data were valid compared with the locally stored data. Outcome measures: Outcome measures included the number of sessions needed to become autonomous, participant satisfaction with the system, and measures of the validity of the transmitted data. Results: Participants became autonomous quickly: 86% at the first testing session and 100% within three testing sessions. At least 98% of participants agreed that the system was easy to use and they would be willing to use it throughout pulmonary rehabilitation. The system transmitted usable data from 98% (95% CI 96 to 100) of sessions and introduced minimal artefact. Mean absolute differences were 0.365 beats/minute for heart rate and 0.133% for oxyhaemoglobin saturation. For heart rate, exact agreement was 72% (SD 9) and similar agreement (within 3 beats/minute) was 99% (SD 1). For oxyhaemoglobin saturation, exact agreement was 87% (SD 3) and similar agreement (within 3%) was 100% (SD 0). Conclusion: The telemonitoring system used in this study was sufficiently valid and acceptable for use in at-home pulmonary rehabilitation by people with chronic respiratory disease. Study registration: ClinicalTrials.gov NCT03295474 and NCT03004716 (subgroup study). Key words: Pulmonary rehabilitation, Telemonitoring, Telerehabilitation, Exercise, Physical therapy

Objective The aim of this pilot study was to assess physical fitness and its relationship with functional dyspnea in survivors of COVID-19 6 months after their discharge from the hospital. Methods Data collected routinely from people referred for cardiopulmonary exercise testing (CPET) following hospitalization for COVID-19 were retrospectively analyzed. Persistent dyspnea was assessed using the modified Medical Research Council dyspnea scale. Results Twenty-three people with persistent symptoms were referred for CPET. Mean modified Medical Research Council dyspnea score was 1 (SD = 1) and was significantly associated with peak oxygen uptake (VO2peak; %) (rho = −0.49). At 6 months, those hospitalized in the general ward had a relatively preserved VO2peak (87% [SD = 20]), whereas those who had been in the intensive care unit had a moderately reduced VO2peak (77% [SD = 15]). Of note, the results of the CPET revealed that, in all individuals, respiratory equivalents were high, power-to-weight ratios were low, and those who had been in the intensive care unit had a relatively low ventilatory efficiency (mean VE/VCO2 slope = 34 [SD = 5]). Analysis of each individual showed that none had a breathing reserve 90%. Conclusion At 6 months, persistent dyspnea was associated with reduced physical fitness. This study offers initial insights into the mid-term physical fitness of people who required hospitalization for COVID-19. It also provides novel pathophysiological clues about the underlaying mechanism of the physical limitations associated with persistent dyspnea. Those with persistent dyspnea should be offered a tailored rehabilitation intervention, which should probably include muscle reconditioning, breathing retraining, and perhaps respiratory muscle training. Impact This study is the first, to our knowledge, to show that a persistent breathing disorder (in addition to muscle deconditioning) can explain persistent symptoms 6 months after hospitalization for COVID-19 infection and suggests that a specific rehabilitation intervention is warranted.

Background Few studies have evaluated muscle strength in COVID-19 ICU survivors. We aimed to report the incidence of limb and respiratory muscle weakness in COVID-19 ICU survivors. Method We performed a cross sectional study in two ICU tertiary Hospital Settings. COVID-19 ICU survivors were screened and respiratory and limb muscle strength were measured at the time of extubation. An ICU mobility scale was performed at ICU discharge and walking capacity was self-evaluated by patients 30 days after weaning from mechanical ventilation. Results Twenty-three patients were included. Sixteen (69%) had limb muscle weakness and 6 (26%) had overlap limb and respiratory muscle weakness. Amount of physiotherapy was not associated with muscle strength. 44% of patients with limb weakness were unable to walk 100 m 30 days after weaning. Conclusion The large majority of COVID-19 ICU survivors developed ICU acquired limb muscle weakness. 44% of patients with limb weakness still had severely limited function one-month post weaning.

BACKGROUND: Maximal oxygen consumption (V(˙) O(2max)) is the most frequently used variable to determine postoperative risk in patients with non-small cell lung cancer (NSCLC), however patients frequently cannot provide the necessary maximum effort to ensure the validity of the V(˙) O(2) measurements. The aim of this observational study was to assess exercise-limiting factors and the rate of achievement of the currently recommended maximality criteria in patients with NSCLC who had been routinely referred for cardiopulmonary exercise testing (CPET) to assess their postoperative risk. METHODS: Patient data, including peak exercise variables and markers used to designate the exercise test as maximal, were retrospectively analysed from 203 preoperative CPET assessments that were performed at Rouen University Hospital from January 2014 until July 2019. RESULTS: Ventilatory limitation was the most common physiological cause of exercise cessation. A total of 62 patients (or 30.5%) achieved either one, or no, markers of maximality. The mean duration of the incremental phase (after the 3-minute warm-up) was 5.1±2 minutes. CONCLUSIONS: About 30% of the patients in this study did not generate maximum effort during CPET. As a result, it is likely that their V(˙) O(2peak) was underestimated and that their post-operative risk was overestimated. It is therefore important to incorporate strategies to verify V(˙) O(2peak) results for patients with (values) close to the risk threshold.

Introduction: TBM can be treated by noninvasive positive airway stenting with the use of portable continuous positive airway pressure (CPAP) devices. CPAP improves exercise tolerance. However, the level of EPAP can be challenging to determine. Our aim was to determine if the level of EPAP required to stent the trachea was correlated to the improvement in exercise capacity. Methods: We retrospectively reviewed the recordings of bronchoscopy performed for the clinical management of patients with TBM referred for CPAP initiation. During the bronchoscopy, the EPAP level was titrated by 5cmH2O increments from 5cmH2O to 20cmH2O. We measured: the decrease in lumen area (DLA) from inspiration to expiration, the angulation α between the posterior and the lateral wall during expiration as well as the anteroposterior distance (apD). These measurements were made during tidal breathing. They were compared to the improvement in the 6-minute walking distance (6MWD) achieved with CPAP. Results: Our cohort consisted of 16 patients. The use of portable CPAP improved by 33m [11 – 53] when compared to self-ventilation (p=0.01). At 5cmH2O, the EPAP did not change the DLA nor the α angle or the apD. At 10cmH2O and above a significant improvement was seen in all these parameters (p Conclusion: Our results suggest that a significant level of EPAP is required to improve the exercise capacity of patients with TBM.

Introduction: TBM is defined by a 50% reduction of the trachea lumen during expiration. However, no data supports this threshold and it may not reflect exercise limitation. The aim of our study was to assess whether endoscopic morphometric parameters could predict exercise limitation in these patients. Methods: We reviewed all the endoscopic recordings of patients referred in our center for the clinical management of TBM between January 2017 and January 2019. For each patient, we measured: the decrease in lumen area (DLA) from inspiration to expiration, the angulation α between the posterior and the lateral wall during expiration as well as the anteroposterior distance (apD). These measurements were made during tidal breathing (TB) and during forced vital capacity maneuvers (FVC). These measurements were compared to the 6-minute walking distance (6MWD) whilst self-venting. Results: We included 16 patients. The DLA was 24±8% during TB and 38±10% during FVC (p Conclusion: The 50% expiratory collapse commonly used to diagnose TBM is poorly correlated to exercise limitation. Airway collapse during TB is correlated to the 6MWD and therefore may be a more relevant marker of the burden of the disease.

Pulmonary rehabilitation (PR) is an evidence-based intervention to manage symptoms related to chronic obstructive respiratory diseases (CORD). Paradoxically, few people with CORD actually engage in PR, and of those, up to one-third do not complete the program. Additionally, some of those who complete the program do not achieve worthwhile benefits. Therefore, the main challenge for the next decades is to offer PR to as many people (that would potentially benefit from it) as possible. This raises questions about factors influencing participation, completion, and responsiveness to PR programs. Among these factors, urinary incontinence (UI) is highly prevalent among people with CORD (much more than in the general population) and may worsen during PR exercise sessions. Paradoxically, UI is poorly explored in routine and scarcely assessed in research, and none of the actual guidelines about PR mention it. However, its potential influence on engagement, completion, and response to PR is of real concern. Therefore, the aim of this perspective is to describe the mechanisms of UI, particularly in the context of CORD, as well as to highlight its prevalence among people with CORD, their burden, and how it could affect a PR approach based on sustained and regular physical activity.

Background Peak oxygen uptake (V˙O2peak) measured by a cardiopulmonary exercise test (CPX) is the gold‐standard for predicting surgical risk in patients with non‐small cell lung cancer (NSCLC). The 3‐minute chair rise test (3CRT) is a simple test requiring minimal resources. This study aimed to determine the ability of 3CRT to predict V˙O2peak in patients with NSCLC. Methods Retrospective data from CPX and 3CRT carried out in 36 patients with NSCLC between March 2018 and February 2019 were included. A multivariate analysis was undertaken to derive a predictive V˙O2peak equation based on performance on the 3CRT. In addition, sensitivity‐specificity analysis was carried out to estimate a threshold 3CRT value for the prediction of V˙O2peak ≥ 15 mL/kg/minute. Results The following equation was obtained: V˙O2peak predicted = (0.04765 × FEV1) ‐ (0.207 59 × BMI) ‐ (0.115 89 × age) + (0.386 09 × vertical distance) + 16.628 69; r2 = 0.75, P, Cardiopulmonary exercise test can stratify surgical risk. Prediction of the peak oxygen uptake (V˙O2peak) value from the 3CRT yields an unacceptable level of error. Reach 49 chair rises or more during the 3CRT predict a V˙O2peak ≥ 15 ml/kg/min.

Objective To evaluate the effect of quadriceps functional electrical stimulation (FES)-cycling on exertional oxygen uptake ( V ˙ o 2 ) compared with placebo FES-cycling in patients with chronic obstructive pulmonary disease (COPD). Design A randomized, single-blind, placebo-controlled crossover trial. Setting Pulmonary rehabilitation department. Participants Consecutive patients (N=23) with COPD Global Initiative for Chronic Obstructive Lung Disease stage 2, 3, or 4 (mean forced expiratory volume during the first second, 1.4±0.4L [50.3% predicted]) who had recently begun a respiratory rehabilitation program. Intervention Two consecutive 30-minute sessions were carried out at a constant load with active and placebo FES-cycling. Main Outcome Measures The primary outcome was mean V ˙ o 2 during the 30-minute exercise session. The secondary outcomes were respiratory gas exchange and hemodynamic parameters averaged over the 30-minute endurance session. Lactate values, dyspnea, and perceived muscle fatigue were evaluated at the end of the sessions. Results FES-cycling increased the physiological response more than the placebo, with a greater V ˙ o 2 achieved of 36.6mL/min (95% confidence interval [CI], 8.9–64.3mL/min) ( P =.01). There was also a greater increase in lactate after FES-cycling (+1.5mmol/L [95% CI, .05–2.9mmol/L]; P =.01). FES-cycling did not change dyspnea or muscle fatigue compared with the placebo condition. Conclusions FES-cycling effectively increased exercise intensity in patients with COPD. Further studies should evaluate longer-term FES-cycling rehabilitation programs.

Background Assessment of maximum respiratory pressures is a common practice in intensive care because it can predict the success of weaning from ventilation. However, the reliability of measurements through an intubation catheter has not been compared with standard measurements. The aim of this study was to compare maximum respiratory pressures measured through an intubation catheter with the same measurements using a standard mouthpiece in extubated patients. Methods A prospective observational study was carried out in adults who had been under ventilation for at least 24 h and for whom extubation was planned. Maximal respiratory pressure measurements were carried out before and 24 h following extubation. Results Ninety patients were included in the analyses (median age: 61.5 years, median SAPS2 score: 42.5 and median duration of ventilation: 7 days). Maximum respiratory pressures measured through the intubation catheter were as reliable as measurements through a standard mouthpiece (difference in maximal inspiratory pressure: mean bias = − 2.43 ± 14.43 cmH2O and difference in maximal expiratory pressure: mean bias = 1.54 ± 23.2 cmH2O). Conclusion Maximum respiratory pressures measured through an intubation catheter were reliable and similar to standard measures. Clinical trial registration Retrospectively Registered in ClinicalTrials.gov (NCT02363231).

Purpose Diaphragm paresis (DP) is characterized by abnormalities of respiratory muscle function. However, the impact of DP on exercise capacity is not well known. This study was performed to assess exercise tolerance in patients with DP and to determine whether inspiratory muscle function was related to exercise capacity, ventilatory pattern and cardiovascular function during exercise. Methods This retrospective study included patients with DP who underwent both diaphragmatic force measurements, and cardiopulmonary exercise testing (CPET). Results Fourteen patients were included. Dyspnea was the main symptom limiting exertion (86%). Exercise capacity was slightly reduced (median VO2peak: 80% [74.5%–90.5%]), mostly due to ventilatory limitation. Diaphragm and overall inspiratory muscle function were correlated with exercise ventilation. Moreover, overall inspiratory muscle function was related with oxygen consumption (r = 0.61) and maximal workload (r = 0.68). Conclusions DP decreases aerobic capacity due to ventilatory limitation. Diaphragm function is correlated with exercise ventilation whereas overall inspiratory muscle function is correlated with both exercise capacity and ventilation suggesting the importance of the accessory inspiratory muscles during exercise for patients with DP. Further larger prospective studies are needed to confirm these results.

Introduction L’oxygenotherapie pulsee (OTP) a ete developpee afin d’augmenter l’autonomie de marche des patients utilisant des concentrateurs d’oxygene portables. Ces dispositifs sont maintenant largement utilises dans la pratique clinique. Cependant, leur impact sur la capacite a la marche est mal evalue. L’objectif de cette etude etait d’evaluer la capacite a l’exercice evaluee au cours d’un test de marche de 6 minutes lorsque le concentrateur etait utilise en OTP comparativement a son utilisation en debit continu. Methodes Nous avons conduit une etude controlee prospective randomisee en cross-over et multicentrique. L’etude etait promue par la Federation ANTADIR. Huit concentrateurs d’oxygene portables differents ont ete evalues. Pour chaque concentrateur, un minimum de 25 patients ont realise deux tests de marche de 6 minutes dans un ordre aleatoire avec l’appareil regle en mode continu ou en mode pulse. Nous avons enregistre la distance parcourue, la saturation a la fin de chaque test et la dyspnee (echelle de Borg). Un test ANOVA avec correction pour comparaison multiple a ete utilise. Resultats Les participants a l’etude avaient un âge median de 65 ans [60–71] et un indice de masse corporelle de 24 kg/m2 [20-–28]. 234 evaluations ont ete realisees. La distance mediane parcourue en mode continu etait de 320 m [226–415] et de 320 m [226–426] en utilisant OTP (ns). Il n’y avait pas de difference significative entre les 8 differents concentrateurs d’oxygene portables. La dyspnee de fin de test etait similaire entre les groupes: 4 sur 10 [3–6] (ns) ainsi que la saturation de fin de test: 89% [85–91] dans le groupe continu et 89% [86–92] dans le groupe OTP (ns). On ne retrouvait pas de difference significative en ce qui concerne la dyspnee et la saturation de fin de test entre les differents concentrateurs evalues. Conclusion Dans notre etude, l’utilisation d’une OTP n’etait pas associee a une diminution de la distance de marche parcourue et permettait d’obtenir une saturation et une dyspnee de fin d’effort similaire a l’administration continue d’oxygene. Les performances de tous les appareils testes etaient comparables.

Pulmonary rehabilitation (PR) improves outcomes in patients with chronic obstructive pulmonary disease (COPD). Optimal assessment includes cardiopulmonary exercise testing (CPET), but consultations are limited. Field tests could be used to individualize PR instead of CPET. The six-minute stepper test (6MST) is easy to set up and its sensitivity and reproducibility have previously been reported in patients with COPD. The aim of this study was to develop a prediction equation to set intensity in patients attending PR, based on the 6MST. The following relationships were analyzed: mean heart rate (HR) during the first (HR1-3) and last (HR4-6) 3 minutes of the 6MST and HR at the ventilatory threshold (HRvt) from CPET; step count at the end of the 6MST and workload at the Ventilatory threshold (VT) (Wvt); and forced expiratory volume in 1 second and step count during the 6MST. This retrospective study included patients with COPD referred for PR who underwent CPET, pulmonary function evaluations and the 6MST. Twenty-four patients were included. Prediction equations were HRvt = 0.7887 × HR1-3 + 20.83 and HRvt = 0.6180 × HR4-6 + 30.77. There was a strong correlation between HR1-3 and HR4-6 and HRvt (r = 0.69, p < 0.001 and r = 0.57, p < 0.01 respectively). A significant correlation was also found between step count and LogWvt (r = 0.63, p < 0.01). The prediction equation was LogWvt = 0.001722 × step count + 1.248. The 6MST could be used to individualize aerobic training in patients with COPD. Further prospective studies are needed to confirm these results.

Introduction L’evaluation des capacites a l’exercice est recommandee avec la realisation d’une epreuve d’effort incrementale ou d’un test de marche de 6 minutes (TDM6) chez les enfants de plus 10 ans atteints de mucoviscidose. Ces deux evaluations peuvent etre limitees par des contraintes techniques et une incertitude existe pour les enfants plus jeunes. Le test de lever de chaise d’une minute (TLC) est un test de tolerance a l’effort simple et valide chez les patients adultes atteints de mucoviscidose. L’objectif de cette etude etait d’evaluer la performance du TLC comme outil d’evaluation des capacites physiques pour les enfants (de 6 a 18 ans) atteints de mucoviscidose. Methodes Dans cette etude multicentrique, les patients ont realise en cross-over un TLC et un TDM6. L’ordre des tests etait randomise et chaque test a ete realise deux fois pour limiter l’effet d’apprentissage. La distance parcourue au TDM6 et le nombre de repetitions au TLC recueillis a la fin de chaque deuxieme test ont ete utilises pour evaluer les correlations. La force des muscles respiratoires et du quadriceps ont egalement ete mesurees. Les parametres cardiorespiratoires, la dyspnee sur l’echelle de BORG et la fatigue dans les jambes sur l’EVA ont ete recueillis. Resultats Trente-six enfants atteints de mucoviscidose ont ete inclus (âge moyen 12,0 ± 3,5 ans et VEMS 95,8 ± 25,0 %). Une moyenne de 39 ± 10,7 repetitions au TLC et de 590 ± 105,2 metres au TDM6 ont ete realisees. Une correlation significative a ete retrouvee entre les performances au TLC et au TDM6 (r = 0,49 ; p Conclusion Le TLC ne peut pas etre utilise comme une alternative complete au TDM6 mais peut etre envisage de part sa simplicite en cas d’impossibilite de realiser un TDM6. Il peut etre utilise chez les enfants de moins de dix ans comme premiere evaluation a l’effort precoce.