The purpose of this study was to compare the pre- and post-handgrip measures with subjects from differing treatment conditions. It was hypothesized that there would be a significant difference in forearm strength measures on subjects participating in a twelve week training program with the Dyna-Ball forearm conditioner (Portland). Subjects (n=29) from three differing treatment groups volunteered to participate in this study over a twelve-week training period with two bouts of conditioning per week. The first group (G1) was instructed to lift weights, including forearm exercises, during their regularly scheduled weight training class. Group two (G2) was instructed to use the Dyna-Ball for a recommended training time (2 min./class) on each arm, and was to abstain from training the forearm muscles with weights during the experiment. Group three (G3), participated in a twelve-week racquetball class without the use of the Dyna-Ball or weight training protocol. Pre- and post-test measures were taken on forearm static strength (kp) using the Jamar Hand Dynamometer (New York). At the conclusion of the study, a survey was given to subjects in G2 to measure their attitude toward the Dyna-Ball forearm conditioner. A mixed model ANOVA with repeated measures was utilized to determine if significant differences existed on improvement in grip strength among the three treatments and improvement in grip between the left and right hand. No significant difference between left- and right-hand grip strength was observed, F(1,26)=2.7, p>.05. The test for grip strength improvement from the pre- to post-test among all treatment groups combined was significant, F(1,26)=10.5,p<.05. Subjects improved their grip strength from 91.8+26.0 on the pre-test to 95.8+28.9 on the post-test, regardless of the treatment group assigned. There was no significant difference on improvement in grip strength among the three treatment groups, F(2,26)=1.8, p>.05. There was also no significant difference in improvement in grip strength between the left and right hand, F(1,26)=1.3,p>.05. The results of this study indicates that training twice a week for twelve weeks with the Dyna-Ball forearm conditioner does not produce greater improvements in static forearm grip strength than lifting weights or participating in racquetball. Improvement in grip strength may occur when training twice a week for twenve weeks regardless of the training conditions used in this experiment. 87.5% of the subjects had indicated that the Dyna-Ball conditioner had a positive effect on their development. The authors felt that results from this investigation may have differed had subjects participated in additional bouts of training per week.Keyword(s): athletics/sports, exercise/fitness, measurement/evaluation