title: Isokinetic investigation of knee extensors and knee flexors in young French soccer players.
abstract: The knee extensor and knee flexor muscle groups in three groups of young soccer players were tested with a Cybex II isokinetic dynamometer and compared with adults. Muscle strength increased with age. The largest gain was observed in young players aged 16-17 years whose quadriceps was the most modified muscle group giving the lowest H/Q ratio. Analysis of the regression equations obtained for torque values at 30 degrees s-1 and 180 degrees s-1 revealed that there were two distinct groups: under 16 and over 16. After reaching 16 years of age, the increase in muscle strength is greater at low velocity than at high velocity.
authors.affiliation: Consultation des Médecine du Sport, Service Explorations Fonctionnelles, Hôpital Pontchaillon, Rennes, France.
authors.forename: P
authors.initials: P
authors.lastname: Rochcongar
authors.forename: R
authors.initials: R
authors.lastname: Morvan
authors.forename: J
authors.initials: J
authors.lastname: Jan
authors.forename: J
authors.initials: J
authors.lastname: Dassonville
authors.forename: J
authors.initials: J
authors.lastname: Beillot
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D007700:Kinetics; D007717:Knee / Q000502:physiology*; D009132:Muscles / Q000502:physiology*; D010807:Physical Endurance; D012916:Soccer; D013177:Sports