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The purpose of this investigation was to study strength differences following an acute exposure to full and partial range-of-motion (ROM) bench press exercise. In addition, we studied elbow joint action durations (via electrogoniometry) during full ROM and partial ROM one repetition maximum (1RM) and five repetition maximum (5RM) bench press exercise. Five strength-trained, male volunteers, age (mean SD) 25.6 3.36 years, were tested on two separate occasions separated by 4 days. Results indicate that partial ROM bench press performance increased significantly for both the 1RM and 5RM conditions (4.8 and 4.1%, respectively, p 0.05). Joint action durations during the flexion phase were significantly shorter than the extension phase for the full ROM 1RM only. For the 5RM, flexion durations increased significantly during both full and partial ROM (p 0.01) but extensions showed no consistent pattern. This investigation, while demonstrating that strength differences can occur with an acute exposure to partial ROM resistance exercise, also provides insight into joint action durations in the execution of full ROM and partial ROM resistance exercise.

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The purpose of this study was to compare energy expenditure (EE) of single-set and multiple-set resistance exercise protocols using indirect calorimetry. Twelve men and twelve women (age = 21.4 ± 1.3 years) performed a single-set (SS) and multiple-set (MS) resistance exercise protocol in random order. The subjects performed two protocols at 70% of their 1-repetition maximum. The protocols consisted of 5 upper-body exercises of either 1 or 3 sets per exercise performed in random order. Metabolic and cardiorespiratory data were recorded over the entire exercise session and during 5 minutes of recovery by a portable metabolic measurement system. Gross (167.9 ± 58.7 kcal) and net (88.3 ± 41.6 kcal) EE for the MS protocol were significantly greater (p < 0.001) than gross (71.3 ± 26.5 kcal) and net (36.3 ± 18.7 kcal) EE of the SS protocol. Conversely, there was no significant difference in the rate of EE between both protocols. Significant gender differences (p < 0.001) in absolute and relative EE were observed for both protocols where values in men were higher than women. Heart rate, respiratory rate, relative V[Combining Dot Above]O2, respiratory exchange ratio, and minute ventilation values were significantly higher during the MS than the SS protocol. The results of this study indicated that MS protocols yield greater metabolic and cardiovascular demands than SS protocols when the number of exercises performed is the same.