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Muscle Activity of a Standard Olympic Barbell Versus a Flexible Barbell for the Push Press: 3438 Board #199 May 30, 9

PURPOSE: To examine and compare the effects of dynamic constant external resistance (DCER) and isokinetic resistance training on set and session rating of perceived exertion (RPE). METHODS: Thirty-one apparently-healthy untrained men were randomly assigned to a DCER or isokinetic training group. Subjects visited the laboratory four times. The first visit was a familiarization session and the subsequent three visits were for training sessions. The groups performed DCER or isokinetic leg extension exercise on the dominant leg for four sets of ten repetitions in each of the three days of training. A category-ratio scale (CR-10) was used to compare efforts between the DCER and isokinetic training modes. RESULTS: There were no three-way interaction for time × group × set, or two-way interactions for time × set or time × group for set RPE (p > 0.05). However, there was a significant set × group interaction for training (p < 0.05). Post-hoc pairwise comparisons for the marginal means (collapsed across time) indicated a significant main effect for set RPE (p < 0.05). RPE increased significantly (p < 0.05) from the first until the last set within all sessions for both training groups. There were no two-way interactions for time × group, or main effect for time or main effect for group for session RPE (p > 0.05). CONCLUSIONS: There were no differences in RPE as acknowledged by the subjects between the DCER or isokinetic training groups. The findings of the current study may indicate the feasibility and cost-effectiveness of traditional DCER training during short-term resistance training compared to more expensive isokinetic devices.