Nineteen young and healthy males (18-21 years) were subjected to two strength training programs (dynamic and static) by using each of the knee extensor (quadriceps) muscles in each subject for each program. The duration of the study was 10 weeks with a frequency of three sessions per week. Pre-training and posttraining strength measurements were made for each program. Weekly post-training measurements were also made. The difference between the pre- and post-training mean strength measurements for the two programs and the difference between the mean strength increases in the two programs were all found to be statistically significant (p c 0.05). This showed that muscular strength could be increased by either of the training programs. However, more positive effects seemed to have been achieved through the isometric or static strength training program of strength gains. J Orthop Sports Phys Ther 1986;8(5):243-247.