Search

Abstract Background Individualized, targeted, and intense training is the hallmark of successful gait rehabilitation in people post-stroke. Specifically, increasing use of the impaired ankle to increase propulsion during the stance phase of gait has been linked to higher walking speeds and symmetry. Conventional progressive resistance training is one method used for individualized and intense rehabilitation, but often fails to target paretic ankle plantarflexion during walking. Wearable assistive robots have successfully assisted ankle-specific mechanisms to increase paretic propulsion in people post-stroke, suggesting their potential to provide targeted resistance to increase propulsion, but this application remains underexamined in this population. This work investigates the effects of targeted stance-phase plantarflexion resistance training with a soft ankle exosuit on propulsion mechanics in people post-stroke. Methods We conducted this study in nine individuals with chronic stroke and tested the effects of three resistive force magnitudes on peak paretic propulsion, ankle torque, and ankle power while participants walked on a treadmill at their comfortable walking speeds. For each force magnitude, participants walked for 1 min while the exosuit was inactive, 2 min with active resistance, and 1 min with the exosuit inactive, in sequence. We evaluated changes in gait biomechanics during the active resistance and post-resistance sections relative to the initial inactive section. Results Walking with active resistance increased paretic propulsion by more than the minimal detectable change of 0.8 %body weight at all tested force magnitudes, with an average increase of 1.29 ± 0.37 %body weight at the highest force magnitude. This improvement corresponded to changes of 0.13 ± 0.03 N m kg− 1 in peak biological ankle torque and 0.26 ± 0.04 W kg− 1 in peak biological ankle power. Upon removal of resistance, propulsion changes persisted for 30 seconds with an improvement of 1.49 ± 0.58 %body weight after the highest resistance level and without compensatory involvement of the unresisted joints or limb. Conclusions Targeted exosuit-applied functional resistance of paretic ankle plantarflexors can elicit the latent propulsion reserve in people post-stroke. After-effects observed in propulsion highlight the potential for learning and restoration of propulsion mechanics. Thus, this exosuit-based resistive approach may offer new opportunities for individualized and progressive gait rehabilitation.

This article describes problems related to the adaptation of the human body to the state of weightlessness. International studies on changes in the parameters of the musculoskeletal and cardiovascular systems are analysed. The paper also presents technical solutions in the form of numerous devices enabling human functioning in microgravity conditions, without significant decrease in physical capacity, as well as muscle and bone atrophy. The chief purpose of this paper is to propose an innovative piece of equipment that applies two pneumatic actuators for training of lower bodily parts of astronauts in a space station. The equipment recommended in the article is of the authors' own patent. Additionally, the authors put forward a proposition of how to control the patented device in a novel way. [ABSTRACT FROM AUTHOR]

Background: Individualized, targeted, and intense training is the hallmark of successful gait rehabilitation in people post-stroke. Specifically, increasing use of the impaired ankle to increase propulsion during the stance phase of gait has been linked to higher walking speeds and symmetry. Conventional progressive resistance training is one method used for individualized and intense rehabilitation, but often fails to target paretic ankle plantarflexion during walking. Wearable assistive robots have successfully assisted ankle-specific mechanisms to increase paretic propulsion in people post-stroke, suggesting their potential to provide targeted resistance to increase propulsion, but this application remains underexamined in this population. This work investigates the effects of targeted stance-phase plantarflexion resistance training with a soft ankle exosuit on propulsion mechanics in people post-stroke. Methods: We conducted this study in nine individuals with chronic stroke and tested the effects of three resistive force magnitudes on peak paretic propulsion, ankle torque, and ankle power while participants walked on a treadmill at their comfortable walking speeds. For each force magnitude, participants walked for 1 min while the exosuit was inactive, 2 min with active resistance, and 1 min with the exosuit inactive, in sequence. We evaluated changes in gait biomechanics during the active resistance and post-resistance sections relative to the initial inactive section. Results: Walking with active resistance increased paretic propulsion by more than the minimal detectable change of 0.8 %body weight at all tested force magnitudes, with an average increase of 1.29 ± 0.37 %body weight at the highest force magnitude. This improvement corresponded to changes of 0.13 ± 0.03 N m kg− 1 in peak biological ankle torque and 0.26 ± 0.04 W kg− 1 in peak biological ankle power. Upon removal of resistance, propulsion changes persisted for 30 seconds with an improvement of 1.49 ± 0.58 %body weight after the highest resistance level and without compensatory involvement of the unresisted joints or limb. Conclusions: Targeted exosuit-applied functional resistance of paretic ankle plantarflexors can elicit the latent propulsion reserve in people post-stroke. After-effects observed in propulsion highlight the potential for learning and restoration of propulsion mechanics. Thus, this exosuit-based resistive approach may offer new opportunities for individualized and progressive gait rehabilitation. [ABSTRACT FROM AUTHOR]

Introduction: It has been demonstrated that aerobic exercise improves cardiovascular health and endurance. Patients with somatic dysfunction have low quality sleep, and training in aerobic exercise is important for enhancing the quality of the patients’ sleep. Training with aerobic exercises includes cycling, running, and brisk walking. Aim: To study that aerobic exercise improves sleep quality in adults with somatic dysfunction Materials and Methods: Databases such as PubMed/Medline, Google Scholar, Scopus, Cochrane were explored to uncover fulltext publications authored in English and were searched to retrieve desired articles. In addition, reference list of the retrieved article were searched in the analysis process. Result: A total 278 articles are retrieved after removing duplicates articles, only 3 articles were evaluated in this literature review. Conclusion: It has been concluded that aerobic exercise training improves sleep quality in adults with somatic dysfunction. Aerobic exercise training has shown promising effects on sleep quality among adults with somatic dysfunction. Research indicates that regular aerobic activity can improve sleep duration, efficiency, and overall quality. By reducing stress and promoting relaxation, aerobic exercise contributes to better sleep patterns, potentially enhancing the well-being of individuals with somatic dysfunction. Implementation: Aerobic exercise protocols are employed to raise physical health and improve sleep quality in adults. [ABSTRACT FROM AUTHOR]

Cervical radiculopathy is a syndrome in which the patient complains of pain along with sensorimotor deficits. This syndrome commonly develops due to compression of the cervical nerve roots. This report describes the case of 52-year-old histopathology laboratory technician who developed cervical radiculopathy due to prolonged cervical forward flexion while working on his table. The patient also complained of pain on the right scapular border. Radiographic analysis showed cervical spondylosis having osteophyte formation on spinous process of C2, C3, C4, C5 and C6 vertebras. Neural tissue tension test was positive for median nerve. He was treated consecutively with strengthening for shoulder abductors, shoulder adductors, scapula elevators and scapular protractors along with thermotherapy. His right medial border scapular pain and symptoms of cervical radiculopathy decreased in severity after the seventh day of treatment. Although the authors cannot suggest a cause-and effect relationship, this report allows for initial hypothesis development that thermotherapy approach may have clinical merit. Future studies in the form of well-designed, randomised clinical trials should be performed to evaluate the effectiveness of this approach in patients with cervical radiculopathy.

Cervical radiculopathy is a syndrome in which the patient complains of pain along with sensorimotor deficits. This syndrome commonly develops due to compression of the cervical nerve roots. This report describes the case of 52-year-old histopathology laboratory technician who developed cervical radiculopathy due to prolonged cervical forward flexion while working on his table. The patient also complained of pain on the right scapular border. Radiographic analysis showed cervical spondylosis having osteophyte formation on spinous process of C2, C3, C4, C5 and C6 vertebras. Neural tissue tension test was positive for median nerve. He was treated consecutively with strengthening for shoulder abductors, shoulder adductors, scapula elevators and scapular protractors along with thermotherapy. His right medial border scapular pain and symptoms of cervical radiculopathy decreased in severity after the seventh day of treatment. Although the authors cannot suggest a cause-and effect relationship, this report allows for initial hypothesis development that thermotherapy approach may have clinical merit. Future studies in the form of well-designed, randomised clinical trials should be performed to evaluate the effectiveness of this approach in patients with cervical radiculopathy. [ABSTRACT FROM AUTHOR]

An innovative moderate-intensity resistive exercise-training (RT) program was tested in thirty-five sarcopenic elders (SAR). The subjects were randomized into two groups: SAR training (SAR-RT), n = 20, 73.0 ± 5.5 years, or SAR non-training (SAR-NT), n = 15, 71.7 ± 3.4 years. The training consisted of 12-week progressive RT, thrice/week, at 60% one-repetition maximum (1RM), 3 sets, 14−16 repetitions for both upper and lower limbs. The pre and post intervention measurements included: the skeletal muscle index (SMI%); strength (1RM); stair-climbing power (SCP); muscle thickness (MT) of vastus lateralis (VL) and elbow flexors (EF), VL pennation angle (PA), rectus femoris (RF) anatomical cross-sectional area (ACSA); reactive oxygen species (ROS), total antioxidant capacity (TAC), protein carbonyls (PC), thiobarbituric acid-reactive substances (TBARS), 8-isoprostane (8-iso-PGF2-α), 8-OH-2-deoxyguanosine (8-OH-dG), as markers of oxidative stress/damage (OxS). In SAR-RT, SCP increased by 7.7% (P < 0.01), MT increased by 5.5% for VL, 10.4% for EF and PA increased by 13.4% for VL (P < 0.001 for all). The RF ACSA increased by 14.5% (P < 0.001). 1RM significantly increased by at least 67% for all muscles tested. Notably muscle strength (1RM) positively correlated (P < 0.001) with TAC and negatively with PC (P < 0.001). In conclusion, moderate intensity RT is an effective strategy to increase muscle mass and strength in SAR, while minimizing OxS.

Anabolic-androgenic steroids are misused, including women, but little is known about the cardiovascular effects of these drugs on females. Aim Evaluated the effects of nandrolone decanoate (ND), physical exercise and estrogen deficiency on female rats. Main methods Female Wistar rats were divided into 8 groups: S and OVX: (SHAM: sham surgery; OVX: ovariectomy, vehicle), SE and OVXE (resistance exercise 5 times a week, vehicle), SD and OVXD (treated with ND, 20 mg/kg/week for 4 weeks); SDE and OVXDE. Treatments were initiated 21 days after surgery. The Bezold–Jarisch reflex was assessed by Phenylbiguanide administration. The right atrium, kidney, and serum were collected for molecular analyses by RT-PCR of atrial natriuretic peptide (ANP), A-type natriuretic peptide receptor (NPR-A) and NPR-C. ELISA assay to estradiol and testosterone concentrations. The gastrocnemius muscle, heart and kidney weights/tibia length were measured. Morphometric analysis of heart was made (H/E) and collagen content of heart and kidney were evaluated using Pirossirius Red. Key findings ND treatment increased ANP expression on atrium and decreased NPR-A expression in kidney. Physical exercise and ovariectomy did not alter this parameter. NPR-C level was reduced in the SDE and OVXDE. Renal and cardiac hypertrophy was observed after ND treatment, with collagen deposition. Plasma estrogen concentrations were reduced and serum testosterone concentrations were increased after ND treatment. Significance ANP has an important role in modulating the cardiovascular effects of ND in females. This modulating may have occurred by the increasing ANP expression, reducing NPR-A and NPR-C expression levels, and changing sex hormone levels. [ABSTRACT FROM AUTHOR]

Among all nonpharmacological treatments, aerobic or resistance training (RT) has been indicated as a significantly important strategy to control hypertension. However, postexercise hypotension responses after intensity alterations in RT are not yet fully understood. The purpose of this study was to compare the outcomes of differing intensities of RT on hypertensive older women. Twenty hypertensive older women participated voluntarily in this study. After a maximum voluntary contraction test (one repetition maximum) and determination of 40% and 80% experimental loads, the protocol (3 sets/90? interset rest) was performed in a single session with the following exercises: leg press, leg extension, leg curl, chest press, elbow flexion, elbow extension, upper back row, and abdominal flexion. Systolic and diastolic blood pressures were evaluated at rest, during exercise peak, and after 5, 10, 15, 30, 45, and 60 minutes of exercise and compared to the control. Both experimental loads were effective (P,0.01) in promoting postexercise systolic hypotension (mmHg) compared to controls, after 30, 45, and 60 minutes, respectively, at 40% (113±2, 112±4, and 110±3 mmHg) and 80% (111±3, 111±4, and 110±4 mmHg). Both procedures promoted hypotension with similar systolic blood pressures (40%: -11%±1.0% and 80%: -13%±0.5%), mean arterial blood pressures (40%: -12%±5.5% and 80%: -12%±3.4%), and rate-pressure products (40%: -15%±2.1% and 80%: -17%±2.4%) compared to control measures (systolic blood pressure: 1%±1%, mean arterial blood pressure: 0.6%±1.5%, rate-pressure product: 0.33%±1.1%). No differences were found in diastolic blood pressure and heart rate measures. In conclusion, hypertensive older women exhibit postexercise hypotension independently of exercise intensity without expressed cardiovascular overload during the session. [ABSTRACT FROM AUTHOR]

Background: Creatine (Cr) supplementation has been widely used among athletes and physically active individuals. Secondary to its performance-enhancing ability, an increase in oxidative stress may occur, thus prompting concern about its use. The purpose of this study is to investigate the effects of Cr monohydrate supplementation and resistance training on muscle strength and oxidative stress profile in healthy athletes. Methods: A randomized, double-blind, placebo-controlled method was used to assess twenty-six male elite Brazilian handball players divided into 3 groups: Cr monohydrate supplemented group (GC, N = 9), placebo group (GP, N = 9), no treatment group (COT, N = 8) for 32 days. All subjects underwent a resistance training program. Blood samples were drawn on 0 and 32 days post Cr supplementation to analyze the oxidative stress markers, thiobarbituric acid reactive species (TBARS), total antioxidant status (TAS), and uric acid. Creatine phosphokinase, urea, and creatinine were also analyzed, as well. Fitness tests (1 repetition maximum - 1RM and muscle endurance) were performed on the bench press. Body weight and height, body fat percentage (by measuring skin folds) and upper muscular area were also evaluated. Statistical analysis was performed using ANOVA. Results: Only GC group showed increase in 1RM (54 ± 9 vs. 63 ± 10 kg; p = 0.0356) and uric acid (4.6 ± 1.0 vs. 7.4 ± 1.6 mg/dl; p = 0.025), with a decrease in TAS (1.11 ± 0.34 vs. 0.60 ± 0.19 mmol/l; p = 0.001). No differences (pre- vs. post-training) in TBARS, creatine phosphokinase, urea, creatinine, body weight and height, body fat percentage, or upper muscular area were observed in any group. When compared to COT, GC group showed greater decrease in TAS (−0.51 ± 0.36 vs. -0.02 ± 0.50 mmol/l; p = 0.0268), higher increase in 1RM (8.30 ± 2.26 vs. 5.29 ± 2.36 kg; p = 0.0209) and uric acid (2.77 ± 1.70 vs. 1.00 ± 1.03 mg/dl; p = 0.0276). Conclusion: We conclude that Cr monohydrate supplementation associated with a specific resistance program promoted a meaningful increase in muscle strength without inducing changes in body composition. The observed significant increase in uric acid and the decrease in TAS suggest that creatine supplementation, despite promoting acute effects on muscle strength improvement, might induce oxidative stress and decreases total antioxidant status of subjects. [ABSTRACT FROM AUTHOR]

Background: Creatine (Cr) supplementation has been widely used among athletes and physically active individuals. Secondary to its performance-enhancing ability, an increase in oxidative stress may occur, thus prompting concern about its use. The purpose of this study is to investigate the effects of Cr monohydrate supplementation and resistance training on muscle strength and oxidative stress profile in healthy athletes. Methods: A randomized, double-blind, placebo-controlled method was used to assess twenty-six male elite Brazilian handball players divided into 3 groups: Cr monohydrate supplemented group (GC, N = 9), placebo group (GP, N = 9), no treatment group (COT, N = 8) for 32 days. All subjects underwent a resistance training program. Blood samples were drawn on 0 and 32 days post Cr supplementation to analyze the oxidative stress markers, thiobarbituric acid reactive species (TBARS), total antioxidant status (TAS), and uric acid. Creatine phosphokinase, urea, and creatinine were also analyzed, as well. Fitness tests (1 repetition maximum - 1RM and muscle endurance) were performed on the bench press. Body weight and height, body fat percentage (by measuring skin folds) and upper muscular area were also evaluated. Statistical analysis was performed using ANOVA. Results: Only GC group showed increase in 1RM (54 ± 9 vs. 63 ± 10 kg; p = 0.0356) and uric acid (4.6 ± 1.0 vs. 7.4 ± 1.6 mg/dl; p = 0.025), with a decrease in TAS (1.11 ± 0.34 vs. 0.60 ± 0.19 mmol/l; p = 0.001). No differences (prevs. post-training) in TBARS, creatine phosphokinase, urea, creatinine, body weight and height, body fat percentage, or upper muscular area were observed in any group. When compared to COT, GC group showed greater decrease in TAS (?0.51 ± 0.36 vs. -0.02 ± 0.50 mmol/l; p = 0.0268), higher increase in 1RM (8.30 ± 2.26 vs. 5.29 ± 2.36 kg; p = 0.0209) and uric acid (2.77 ± 1.70 vs. 1.00 ± 1.03 mg/dl; p = 0.0276). Conclusion: We conclude that Cr monohydrate supplementation associated with a specific resistance program promoted a meaningful increase in muscle strength without inducing changes in body composition. The observed significant increase in uric acid and the decrease in TAS suggest that creatine supplementation, despite promoting acute effects on muscle strength improvement, might induce oxidative stress and decreases total antioxidant status of subjects. [ABSTRACT FROM AUTHOR]

Background: Isokinetic evaluation and training are commonly used. Hemodynamic response during this type of exercise is unknown and therefore usually not recommended in some patients (elderly, patients with risk factors or with cardio-vascular disease). The aim of this study was to evaluate the hemodynamic response during a classical testing and training isokinetic session. Method: 20 healthy young male participated to this study. The hemodynamic response wa continuously and non invasively (Task Force Monitor) measured on a Cybex Norm (knee extension and flexion). The hemodynamic parameters were systolic blood pressure (SBP), heart rate (HR) and cardiac output (Q). Results: A low speed (60°/s) test was more exhausting than one at higher speed (180°/s) which is probably related to its duration. Whereas rest periods seemed sufficient for muscle recovery allowing during training, maintenance of performance over the different sets, changes in hemodynamic parameters (HR, SBP & Q) were observed over successive sets and did not recover totally during rest. Systolic ejection volume did neither change nor contribute to the increase of cardiac output (+ 70 to 84% compared to rest). Values measured during test and training were high but not excessive (HR max=135 ± 20 bpm or 70% of HRmax predicted; SBP max =185 ± 26 mmHg; Q=11.2 ± 2.2 l/min). Conclusions: Values measured during test and training are high but not excessive. Isokinetic training in cardio-vascular risk patients should be composed of shorter set duration and longer rest periods as generally applied, without loosing maximal muscle contraction over the entire rage of motion. [ABSTRACT FROM AUTHOR]

Objective. To measure the impact of different recovery periods on systolic blood pressure (SBP) and heart rate (HR) during classical resistance training (RT) modalities Background. Resistance training was introduced into rehabilitation programs to improve the efficiency of traditional training. The impact of different RT modalities on muscular performance is well known but the recovery periods between successive RT sets recommended in the literature varied between 30 s and 5 min. Method. Twenty one healthy subjects were tested while performing a classical RT paradigm: 3 sets of 10 repetitions at 75% of 1-RM, with recovery periods of 30, 60, 90 and 120 s. Results. A recovery period of 30 or 60 s did not allow a return of SBP and HR to resting values. A progressive drift of the values was observed in the successive rests as well as in the successive efforts. A recovery period longer than 60 s (90 and 120 s) allowed a return of SBP and HR to resting values. Conclusions. A recovery period of 90 s or more between successive classical RT sets is recommended in order to avoid excessive SBP and HR elevation. [ABSTRACT FROM AUTHOR]

Background: Aging is associated with reductions in muscle mass and strength, but nutrition and exercise interventions can delay this progression and enhance the quality of life. Objective: We examined whether the predominant source of protein consumed by older men influenced measures of muscle size and strength, body composition, resting energy expenditure, and skeletal muscle creatine concentrations in response to 12 wk of resistive training. Design: After consuming a lactoovovegetarian (LOV) diet for 2 wk, 21 men aged 65 ± 5 y were randomly assigned to either consume a beef-containing (BC) diet (n = 10) or to continue the LOV diet (n = 11) throughout resistive training. The BC diet included 0.6 g protein · kg-1 · d-1 from beef and the LOV diet included 0.6 g protein · kg-1 · d-1 from textured vegetable protein (soy) sources. The remaining protein in the diets came from self-selected LOV sources. Results: The mean total protein intake for both groups ranged from 1.03 to 1.17 g · kg-1 · d-1 during the intervention. Men in both groups had improvements (14-38%) in maximal dynamic strength of all the muscle groups trained with no significant difference between groups. With resistive training, cross-sectional muscle area of the vastus lateralis increased in both groups (4.2 ± 3.0% and 6.0 ± 2.6% for the LOV and BC groups, respectively) with no significant difference between groups. Body composition, resting energy expenditure, and concentrations of muscle creatine, phosphocreatine, and total creatine did not differ significantly between groups or change over time. Conclusions: These data suggest that increases in muscle strength and size were not influenced by the predominant source of protein consumed by older men with adequate total protein intake. [ABSTRACT FROM AUTHOR]

The risk of metabolic disorders, including type 2 diabetes and cardiovascular diseases, is increased in depression, there is a decrease in life expectancy by 8-10 years. Pharmacotherapy is the first-line method in the treatment of depression. However, pharmaceutical-related side-effects and resistance to antidepressant pharmacotherapy create serious problems in treatment. Regular exercise not only weakens the symptoms of depression, increases aerobic capacity and muscle strength, but also has a positive effect on comorbid diseases. The purpose of this review is to answer the question, on which parameters of exercise the antidepressant effect depends. The review highlights the results of clinical studies of different types of exercises, intensities and modalities for the treatment of depression over the past 10 years. Because of the contradictory results of the studies, it is impossible to make final conclusions regarding the parameters of exercise. It is possible to say with high probability that in the treatment of depression, moderate and intense aerobic exercises with elements of strength exercises and a variety of coordination exercises more often lead to a positive effect than monotonous exercises with low intensity. It is possible that regular patient adherence to the prescribed exercise regimen is more important than the specific exercise type.