Effect of muscle length on voluntary activation of the plantar flexors in boys and men

Kluka, Virginie; Martin, Vincent; Vicencio, Sebastian Garcia; Giustiniani, Mathias; Morel, Claire; Morio, Cedric; Coudeyre, Emmanuel; Ratel, Sébastien

Document type :

Article dans une revue scientifique

DOI :

10.1007/s00421-016-3362-6

PMID :

27032806

Permalink :

http://hdl.handle.net/20.500.12210/12194

Title :

Effect of muscle length on voluntary activation of the plantar flexors in boys and men

Author(s) :

Kluka, Virginie [Auteur]
Martin, Vincent [Auteur]
Vicencio, Sebastian Garcia [Auteur]
Giustiniani, Mathias [Auteur]
Morel, Claire [Auteur]
Morio, Cedric [Auteur]
Coudeyre, Emmanuel [Auteur]
Ratel, Sébastien [Auteur]

Journal title :

European journal of applied physiology

Abbreviated title :

Eur. J. Appl. Physiol.

Volume number :

116

Pages :

1043-1051

Publication date :

2016-05-01

ISSN :

1439-6319

English keyword(s) :

Motor unit recruitment
Torque
Magnetic stimulation
Childhood

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

OBJECTIVE: The aim of the present study was to compare the effect of muscle length on the maximal voluntary activation level (VA) of the plantar-flexors between children and adults. METHODS: Fourteen boys (10.0 ± 1.0 years) ...
Show more >OBJECTIVE: The aim of the present study was to compare the effect of muscle length on the maximal voluntary activation level (VA) of the plantar-flexors between children and adults. METHODS: Fourteen boys (10.0 ± 1.0 years) and fifteen men (24.6 ± 4.2 years) performed 5-s maximal isometric voluntary contractions (MVC) of the plantar-flexor muscles at seven ankle angles [from 10° in dorsi-flexion (DF) to 20° in plantar-flexion (PF); 0° = reference position; the angle between the plantar surface and leg is a right angle]. Single magnetic stimulations were delivered to the posterior tibial nerve during MVCs to determine VA. RESULTS: Results showed a higher absolute torque of the plantar-flexor muscles at long (10° DF) than at short muscle length (20° PF) in men (89.4 ± 19.4 vs. 46.8 ± 17.0 N m, P < 0.001) and boys (44.9 ± 18.5 vs. 26.6 ± 12.8 N m, P < 0.001). On average, VA was significantly higher in men than in boys (92.4 ± 1.7 vs. 87.6 ± 1.6 %, P < 0.05). However, no significant main effect of the ankle angle was observed on VA. CONCLUSIONS: The VA partly accounts for the plantar-flexors MVC torque difference between children and adults but is not affected by the muscle length changes in both groups. Therefore, VA cannot account for the shape of the torque-angle relationship on the plantar-flexor muscles.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Collections :

Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369

Research team(s) :

Activité Physique, Muscle, Santé (APMS)

Submission date :

2019-09-24T10:01:15Z

Effect of muscle length on voluntary ... BibTeX CSV Excel RIS

Effect of muscle length on voluntary ...

BibTeX

CSV

Excel

RIS