Isokinetic peak torque and hamstring/quadriceps ratios in young basketball players: Effects of age, velocity, and contraction mode

The purpose of this study was to provide an extensive isokinetic profile, including peak torque and "functional" and "conventional" muscle group ratios, of basketball players throughout the developmental years 12-17. Furthermore, we investigated the effects of age and angular vel...

Full description

Saved in:
Bibliographic Details
Published in:Journal of sports medicine and physical fitness 2003-12, Vol.43 (4), p.444-452
Main Authors: GERODIMOS, V, MANDOU, V, ZAFEIRIDIS, A, IOAKIMIDIS, P, STAVROPOULOS, N, KELLIS, S
Format: Article
Language:English
Subjects:
Adolescent
Age Factors
Basketball - physiology
Biological and medical sciences
Child
Exercise
Fundamental and applied biological sciences. Psychology
Humans
Injuries
Knee - physiology
Male
Motion
Muscle Contraction - physiology
Muscle, Skeletal - physiology
Muscular Strength
Physical Activities
Physical Fitness
Profiles
Team Sports
Torque
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The purpose of this study was to provide an extensive isokinetic profile, including peak torque and "functional" and "conventional" muscle group ratios, of basketball players throughout the developmental years 12-17. Furthermore, we investigated the effects of age and angular velocity on peak torque and reciprocal muscle group ratios, and observed the force-velocity pattern. Basketball players (n=180) 12 to 17 years. were divided according to their age in 6 equal (n=30) groups aged 12, 13, 14, 15, 16, 17 years. All subjects performed maximum knee extension and flexion efforts at 60 inverted exclamation mark /s and 180 inverted exclamation mark /s angular velocities under eccentric and concentric conditions. The absolute (Nm) peak torque was measured, and the relative peak torque (PT/BW) and "functional" and "conventional" reciprocal muscle group ratio (%) were calculated. PT/BW values of knee flexors ranged from 0.98 to 2.29 Nm/kg and of extensors from 1.53 to 3.69 Nm/kg, across all age, velocity, and muscle action levels. PT/BW was higher at slow speed and during eccentric contraction irrespective of age and angular velocity/muscle action. The results indicated a significant (p
ISSN:0022-4707
1827-1928