10 results on '"Colson, S. S."'
Search Results
2. Aerobic activity and environmental enrichment: Perspective for Alzheimer's patient
- Author
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Ben-Sadoun, G., Petit, P. -D., Colson, S. S., Koenig, A., Robert, P., Psychiatrie & Neuropsychologie, and RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience
- Subjects
Cognitive enrichment ,Serious games ,Regular aerobic physical activity ,Alzheimer disease - Abstract
Aims. - This article summarizes the literature on some of the biological mechanisms involved in Alzheimer disease and their evolution in the context of non-pharmacological interventions. Actuality. - Regular aerobic physical activity and enriched environment are two methods derived from the metabolic hypothesis and the cognitive enrichment hypothesis respectively. Their effects on aerobic fitness, cardiorespiratory function, brain structure and cognition are clearly established in the aging process in humans and animals. In the field of Alzheimer's disease, these methods might halt mitochondrial, amyloidogenic and tau pathophysiological development. Perspectives. - In elderly patients, the use of exergames (active video games) develops in order to make physicals activities more attractive. These new technologies, with high potential, would propose simultaneously aerobic activity in an enriched environment. Intervention research on the feasibility and the effects of these exergames for Alzheimer patients may be a way forward. Conclusion. - We propose to use serious (exer)games to stimulate Alzheimer patients. These serious games, being specifically developed for Alzheimer patients, would be to integrate high intensity aerobic activity and enriched environment into a ludic and accessible therapy.
- Published
- 2015
3. sEMG During Whole-Body Vibration Contains Motion Artifacts and Reflex Activity
- Author
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Lienhard, K., Cabasson, A., olivier meste, Colson, S. S., Laboratoire Motricité Humaine Expertise Sport Santé ( LAMHESS ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Université de Toulon ( UTLN ), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe SIGNAL, Signal, Images et Systèmes ( SIS ), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Motricité Humaine Expertise Sport Santé (LAMHESS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université de Toulon (UTLN)-Université Côte d'Azur (UCA), Signal, Images et Systèmes (Laboratoire I3S - SIS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), and Meste, Olivier
- Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering ,[SDV.IB]Life Sciences [q-bio]/Bioengineering ,[ SDV.IB ] Life Sciences [q-bio]/Bioengineering ,[ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing ,[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing ,Research Article ,[SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing - Abstract
The purpose of this study was to determine whether the excessive spikes observed in the surface electromyography (sEMG) spectrum recorded during whole-body vibration (WBV) exercises contain motion artifacts and/or reflex activity. The occurrence of motion artifacts was tested by electrical recordings of the patella. The involvement of reflex activity was investigated by analyzing the magnitude of the isolated spikes during changes in voluntary background muscle activity. Eighteen physically active volunteers performed static squats while the sEMG was measured of five lower limb muscles during vertical WBV using no load and an additional load of 33 kg. In order to record motion artifacts during WBV, a pair of electrodes was positioned on the patella with several layers of tape between skin and electrodes. Spectral analysis of the patella signal revealed recordings of motion artifacts as high peaks at the vibration frequency (fundamental) and marginal peaks at the multiple harmonics were observed. For the sEMG recordings, the root mean square of the spikes increased with increasing additional loads (p0.05), and was significantly correlated to the sEMG signal without the spikes of the respective muscle (r range: 0.54 - 0.92, p0.05). This finding indicates that reflex activity might be contained in the isolated spikes, as identical behavior has been found for stretch reflex responses evoked during direct vibration. In conclusion, the spikes visible in the sEMG spectrum during WBV exercises contain motion artifacts and possibly reflex activity. Key pointsThe spikes observed in the sEMG spectrum during WBV exercises contain motion artifacts and possibly reflex activityThe motion artifacts are more pronounced in the first spike than the following spikes in the sEMG spectrumReflex activity during WBV exercises is enhanced with an additional load of approximately 50% of the body mass.
- Published
- 2015
4. The Effect of Whole-body Vibration on Muscle Activity in Active and Inactive Subjects.
- Author
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Lienhard, K., Vienneau, J., Friesenbichler, B., Nigg, S., Meste, O., Nigg, B. M., and Colson, S. S.
- Subjects
ELECTROMYOGRAPHY ,GOODNESS-of-fit tests ,MUSCLES ,QUESTIONNAIRES ,RESEARCH funding ,VIBRATION (Mechanics) ,REPEATED measures design ,DATA analysis software ,DESCRIPTIVE statistics ,MANN Whitney U Test ,ONE-way analysis of variance - Abstract
The purpose of this study was to compare lower limb muscle activity between physically active and inactive individuals during whole-body vibration exercises. Additionally, transmissibility of the vertical acceleration to the head was quantified. 30 active and 28 inactive participants volunteered to stand in a relaxed (20 °) and a squat (60 °) position on a side-alternating WBV platform that induced vibrations at 16 Hz and 4 mm amplitude. Surface electromyography (sEMG) was measured in selected lower limb muscles and was normalized to the corresponding sEMG recorded during a maximal voluntary contraction. The vertical acceleration on the head was evaluated and divided by the vertical platform acceleration to obtain transmissibility values. Control trials without vibration were also assessed. The outcomes of this study showed that (1) WBV significantly increased muscle activity in the active (absolute increase: + 7 %, P < 0.05) and inactive participants ( + 8 %, P < 0.05), (2) with no differences in sEMG increases between the groups (P > 0.05). However, (3), transmissibility to the head was greater in the active (0.080) than the inactive participants (0.065, P < 0.05). In conclusion, inactive individuals show similar responses in sEMG due to WBV as their active counterparts, but are at lower risk for potential side-effects of vibration exposure. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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5. Lower Limbs Power and Stiff ness after Whole-Body Vibration.
- Author
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Colson, S. S. and Petit, P. D
- Subjects
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LEG physiology , *ANALYSIS of variance , *ATHLETIC ability , *BODY weight , *GOODNESS-of-fit tests , *JUMPING , *STATISTICAL sampling , *STATISTICS , *STATURE , *VIBRATION (Mechanics) , *DATA analysis , *RANDOMIZED controlled trials , *REPEATED measures design , *DATA analysis software , *DESCRIPTIVE statistics - Abstract
The interest in whole-body vibration (WBV) for the enhancement of neuromuscular performance has received considerable attention. However, scientific evidence supporting the optimal prescription of WBV settings is lacking. This study investigated the acute eff ect of WBV combining high frequency/high peak-to-peak displacement (HH) or low frequency/low peakto- peak displacement (LL) vs. sham intervention (SHAM) on lower limb muscle power and stiffness. A total of 223 volunteers were randomly assigned to either the HH, LL or SHAM group. Countermovement jump (CMJ) height, maximal and average power, maximal and average lower limbs stiff ness obtained during a hopping test were recorded before and after the respective intervention. After the intervention, the HH group showed an increase of 4.64 % in CMJ height (p < 0.001) whereas the values of both the LL and SHAM groups did not change. In addition, maximal and average power of the lower limbs were signifi cantly increased in all groups (p < 0.001; 10.89 % and 12.82 %, respectively) while no eff ect on lower limbs stiff ness was observed. Our data show that high frequency combined with high peak-to-peak displacement is the most optimal WBV setting for CMJ height enhancement. Further investigation should be undertaken to ascertain the eff ectiveness of WBV on lower limbs stiff ness. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
6. Whole Body Vibration Does not Enhance Muscle Activation.
- Author
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Colson, S. S., Petit, P.-D., Hébreard, L., Tessaro, J., and Pensini, M.
- Subjects
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MUSCLE contraction , *BODY movement , *STRIATED muscle physiology , *MUSCLE strength , *KNEE anatomy , *MUSCLES - Abstract
Whether a whole body vibration session can enhance muscle voluntary activation remains debated. This pilot study thus investigated the acute effects of an intervention with whole body vibration versus a "sham" intervention on the voluntary activation of knee extensor muscles. Ten healthy subjects volunteered to participate in two interventions, vibration and sham, in randomized order. Knee extensor muscle voluntary activation, contractile properties and maximal voluntary isometric contraction were assessed before and immediately after each intervention. No significant differences were found for any of the variables. After both interventions, muscle activation remained unchanged, whereas maximal voluntary isometric contraction was significantly reduced (p<0.05). In conclusion, the two interventions induced the same adaptations in the knee extensors. These findings can be useful in conceiving whole body vibration protocols, although future research is warranted to address the influence of vibration on neural adaptation. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
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7. Time Course of Mechanical and Neuromuscular Characteristics of Cyclists and Triathletes during a Fatiguing Exercise.
- Author
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Garrandes, F., Colson, S. S., Pensini, M., and Legros, P.
- Subjects
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FATIGUE (Physiology) , *MUSCLE motility , *CYCLISTS , *ATHLETES , *SPORTS , *EXERCISE , *MUSCLE contraction , *TORQUE , *PHYSICAL fitness - Abstract
This study examined the impact of sport specificity on the time course of fatigue during maximal voluntary eccentric, concentric and isometric torque production following a submaximal isokinetic fatiguing exercise. Seven cyclists and seven triathletes performed a fatiguing exercise consisting of nine sets of 31 isokinetic concentric knee extensions at 1.05 rad·s-1. Fatigue was assessed pre-exercise, after three and six sets, and post-exercise. The maximal knee extension torque associated with electromyographic (EMG) activity was recorded during voluntary contractions and electrically induced contractions (single and paired twitches). The maximal voluntary eccentric torque production declined in cyclists (18 ± 3.5%, p <0.05) and was not significantly affected in triathletes (5 ± 2.5%, p >0.05). The decrease in cyclists was associated with an increase in the sum of the normalized EMG (nRMS) values of the three agonist muscles (p<0.01). Although no significant difference was observed between groups, the two-way repeated-measure analysis of variance revealed a time effect on maximal concentric and isometric torque, twitch contractile and electrophysiological response (Mmax) properties. No modification in the activation and coactivation levels was observed. In conclusion, these results indicate that the time course of fatigue, especially during eccentric contractions, is mediated by sport-specific adaptations likely due to the mode of muscle contraction used in the activity. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
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8. Neuromuscular fatigue kinetics are sport specific.
- Author
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Garrandes, F., Colson, S. S., Pensini, M., and Legros, P.
- Subjects
- *
FATIGUE (Physiology) , *KNEE , *MUSCLES , *EXERCISE , *ATHLETES - Abstract
The article determines whether fatigue kinetics and fatigue origin (central vs. peripheral adaptations) of the knee extensor muscles are sport specific. The experiment involving fatiguing exercises for endurance-trained men (ENDU) and explosive power-trained men (EXPLO), subdivided into cyclists and triathletes is described. The results showed faster exhaustion in the EXPLO group as compared to the ENDU group. Following the fatiguing exercise used in this study, neuromuscular alterations mainly arose from peripheral mechanisms.
- Published
- 2005
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9. The effect of tibialis anterior weakness on foot drop and toe clearance in patients with facioscapulohumeral dystrophy.
- Author
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Gambelli CN, Bredin J, Doix AM, Garcia J, Tanant V, Fournier-Mehouas M, Desnuelle C, Sacconi S, and Colson SS
- Subjects
- Humans, Gait physiology, Muscle, Skeletal, Muscle Weakness, Toes, Biomechanical Phenomena, Walking physiology, Peroneal Neuropathies
- Abstract
Background: Facioscapulohumeral dystrophy is a genetic disease characterized by progressive muscle weakness leading to a complex combination of postural instability, foot drop during swing and compensatory strategies during gait that have been related to an increased risk of falling. The aim is to assess the effect of tibialis anterior muscle weakness on foot drop and minimum toe clearance of patients with facioscapulohumeral dystrophy during gait., Methods: Eight patients allocated to a subgroup depending on the severity of tibialis anterior muscle weakness, assessed by manual muscle testing (i.e., severe and mild weakness), and eight matched control participants underwent gait analysis at self-selected walking speeds., Findings: Walking speed, for all facioscapulohumeral dystrophy patients, and step length, for patients with severe weakness only, were significantly decreased compared to control participants. Minimum toe clearance was similar across all groups, but its variability was increased only for patients with severe weakness. A greater foot drop was systematically observed for patients with severe weakness during swing and only in late swing for patients with mild weakness. Individual strategies to compensate for foot drop remain unclear and may depend on other muscle impairment variability., Interpretation: Although all patients were able to control the average height of their foot trajectory during swing, patients with severe tibialis anterior muscle weakness exhibited increased foot drop and minimum toe clearance variability. Manual muscle testing is a simple, cheap and effective method to assess tibialis anterior muscle weakness and seems promising to identify facioscapulohumeral dystrophy patients with an increased risk of tripping., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier Ltd.)
- Published
- 2023
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10. Lower limbs power and stiffness after whole-body vibration.
- Author
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Colson SS and Petit PD
- Subjects
- Analysis of Variance, Exercise Test, Female, Humans, Male, Young Adult, Lower Extremity physiology, Muscle Strength physiology, Vibration
- Abstract
The interest in whole-body vibration (WBV) for the enhancement of neuromuscular performance has received considerable attention. However, scientific evidence supporting the optimal prescription of WBV settings is lacking. This study investigated the acute effect of WBV combining high frequency/high peak-to-peak displacement (HH) or low frequency/low peak-to-peak displacement (LL) vs. sham intervention (SHAM) on lower limb muscle power and stiffness. A total of 223 volunteers were randomly assigned to either the HH, LL or SHAM group. Countermovement jump (CMJ) height, maximal and average power, maximal and average lower limbs stiffness obtained during a hopping test were recorded before and after the respective intervention. After the intervention, the HH group showed an increase of 4.64% in CMJ height (p<0.001) whereas the values of both the LL and SHAM groups did not change. In addition, maximal and average power of the lower limbs were significantly increased in all groups (p<0.001; 10.89% and 12.82%, respectively) while no effect on lower limbs stiffness was observed. Our data show that high frequency combined with high peak-to-peak displacement is the most optimal WBV setting for CMJ height enhancement. Further investigation should be undertaken to ascertain the effectiveness of WBV on lower limbs stiffness., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2013
- Full Text
- View/download PDF
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