Exercises for knee flexors and extensors in uninjured soccer players: effects of two different programs

The effects of two 4-week training programs on knee flexor and extensor strength were measured isokinetically (angular velocity 30 degrees, 180 degrees/s) and isometrically in division IV soccer players. Group A followed a team training program and group B an individual weight training program. Group C served as controls. Muscle strength was not increased by soccer training alone, but was increased by the individual training program, which resulted in significantly better knee extensor strength than did the team training program.