title: [Influence of age and physical activity on isokinetic characteristics of hamstring and quadriceps muscles of young gymnasts and soccer players].
abstract: OBJECTIVE
  The aim of this work is the assessment of age and sport influences on the isokinetic knee muscle characteristics.
  
  
  METHODS
  Subjects performed a bilateral knee flexion/extension test on an isokinetic device at 60 and 180 degrees.s(-1) speed in concentric mode. The three parameters studied in this work were the Peak Torque, Average Power and hamstring/quadriceps ratio. Thirty-eight soccer players (16,6 +/- 1.4 years old) and 22 gymnasts (18 +/- 2.8 years old) were tested. The population was separated into three groups : 15 years old, 17 years old, 20 years old.
  
  
  RESULTS
  The isokinetic values of soccer players were significantly higher (p < 0.0001) than those of the the gymnasts. The isokinetic values of the oldest soccer players were significantly higher (0.005 < p < 0.05) for hamstrings than those of the younger soccer players. The isokinetic values of the oldest gymnasts were significantly higher (0.005 < p < 0.05) for the quadriceps than those of the younger gymnasts. There were no significant differences between dominant and non dominant limbs in soccer players.
  
  
  CONCLUSIONS
  In the present study, the muscular maturation improves the absolute strength of the older sportsmen in comparison to the younger. Soccer favor most the absolute strength of the inferior member in comparison to the gymnastics.
authors.affiliation: Laboratoire, Structure et Fonction du Muscle, UFR STAPS, 261, route de Grenoble, 06205 cedex 3, Nice, France. maxamato@ifrance.com
authors.forename: M
authors.initials: M
authors.lastname: Amato
authors.forename: F
authors.initials: F
authors.lastname: Lemoine
authors.forename: J
authors.initials: J
authors.lastname: Gonzales
authors.forename: C
authors.initials: C
authors.lastname: Schmidt
authors.forename: P
authors.initials: P
authors.lastname: Afriat
authors.forename: P L
authors.initials: PL
authors.lastname: Bernard
mesh_terms: D000328:Adult; D000367:Age Factors; D006173:Gymnastics / Q000502:physiology*; D006801:Humans; D007700:Kinetics; D018482:Muscle, Skeletal / Q000502:physiology*; D012916:Soccer / Q000502:physiology*; D013848:Thigh
vernacular_title: Influence de l'âge et de l'activité sportive sur le profil isocinétique des muscles quadriceps et ischio-jambiers de jeunes sportifs gymnastes et footballeurs.