The problem of this study is to determine the stability of interest of male and female students at the various age levels in the School of Education of North Texas State Collage, Denton, Texas. To be more specific, the problem is to determine the relationship of age, sex, or both upon stability of interest.

The purpose of this study was to determine the effects of weight loadings and repetitions, frequency of exercise, and knowledge of theoretical principles of weight training on changes in muscular strength. Another purpose was to analyze these effects and determine implications for coaches, physical educators, physical therapists, and others interested in determining the optimum combination of the three variables for increasing muscular strength.