Mohamed Abdelhafid Kadri1,2, Frederic Noé2, Merbouha Boulahbel Nouar1, Thierry Paillard3. 1. Laboratoire Etudes Sociales et Humaines et Analyse des Activités Physiques et Sportives, Département EPS, Université Badji Mokhtar Annaba, BP 12, 23000, Annaba, Algeria. 2. Laboratoire Mouvement, Equilibre, Performance et Santé (EA 4445), Département STAPS, ZA Bastillac Sud, Université de Pau et des Pays de l'Adour, 11 rue Morane Saulnier, 65000, Tarbes, France. 3. Laboratoire Mouvement, Equilibre, Performance et Santé (EA 4445), Département STAPS, ZA Bastillac Sud, Université de Pau et des Pays de l'Adour, 11 rue Morane Saulnier, 65000, Tarbes, France. thierry.paillard@univ-pau.fr.
Abstract
PURPOSE: To compare the effects of unilateral strength training by stimulated and voluntary contractions on muscle strength and monopedal postural control of the contralateral limb. METHODS:36 non-active healthy male subjects were recruited and split randomly into three groups. Two groups of 12 subjects took part in astrength-training program (3 sessions a week over 8 weeks) comprising 43 contractions of the quadriceps femoris of the ipsilateral limb (at 20% of the MVC). One group carried out voluntary contractions exclusively (VOL group), while the other group benefited exclusively from electro-induced contractions (NMES group). The other 12 subjects formed the control (CON) group. Assessments of MVC and monopedal postural control in static and dynamic postural tasks were performed with the ipsilateral (ISPI) and contralateral (CONTRA) limbs before (PRE) and after (POST) completion of the training program. RESULTS: After the training program, the MVC of the IPSI and CONTRA limbs increased similarly for both experimental groups (VOL and NMES). There were no significant improvements of monopedal postural control for the IPSI or CONTRA limbs in either the VOL or NMES experimental group. No change was observed for the CON group over the protocol period. CONCLUSION: The purposed training program with NMES vs VOL contractions induced strength gains but did not permit any improvement of contralateral monopedal postural control in healthy young subjects. This has potential for therapeutic application and allows clinicians to focus their training programs on dynamic and poly-articular exercises to improve the postural control in young subjects.
RCT Entities:
PURPOSE: To compare the effects of unilateral strength training by stimulated and voluntary contractions on muscle strength and monopedal postural control of the contralateral limb. METHODS: 36 non-active healthy male subjects were recruited and split randomly into three groups. Two groups of 12 subjects took part in a strength-training program (3 sessions a week over 8 weeks) comprising 43 contractions of the quadriceps femoris of the ipsilateral limb (at 20% of the MVC). One group carried out voluntary contractions exclusively (VOL group), while the other group benefited exclusively from electro-induced contractions (NMES group). The other 12 subjects formed the control (CON) group. Assessments of MVC and monopedal postural control in static and dynamic postural tasks were performed with the ipsilateral (ISPI) and contralateral (CONTRA) limbs before (PRE) and after (POST) completion of the training program. RESULTS: After the training program, the MVC of the IPSI and CONTRA limbs increased similarly for both experimental groups (VOL and NMES). There were no significant improvements of monopedal postural control for the IPSI or CONTRA limbs in either the VOL or NMES experimental group. No change was observed for the CON group over the protocol period. CONCLUSION: The purposed training program with NMES vs VOL contractions induced strength gains but did not permit any improvement of contralateral monopedal postural control in healthy young subjects. This has potential for therapeutic application and allows clinicians to focus their training programs on dynamic and poly-articular exercises to improve the postural control in young subjects.
Authors: V V Arkov; T F Abramova; T M Nikitina; D A Afanasjeva; D V Suprun; O N Milenin; A G Tonevitsky Journal: Bull Exp Biol Med Date: 2010-07 Impact factor: 0.804