Flexibility and Strength Training

The purpose of this study was to determine the effects of weight training on the range of motion (flexibility) of ankle, trunk, and shoulder joints. There has been a common belief that strength could not be promoted without impairing flexibility. Thirteen male college students participated in an 11-week weight training program, exercising three times weekly, performing eight exercises involving all major muscle groups of the body. Using a flexometer, six flexibility tests, two of which were specific to each of the three joint areas, were administered pre- and post-training. Significant (p≤0.05) increases were observed in ankle dorsi-flexion and shoulder extension. It was concluded that participation in a similarly structured weight training program to develop muscular strength would not impair flexibility but might increase it.