The effect of sets and repetitions on acceleration during the prone dumbbell row

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Lewis, Christopher A.
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Load is an important parameter in resistance training in rehabilitation, athletic performance and general fitness training. In practice and in research, load assessment during resistance exercises has generally been based upon weight. However, it is known that loading during exercise is related to the joint moment generated during resistance exercise. Acceleration is a key parameter which influences load magnitude but this aspect of loading has not been previously explored. The primary objective of the study was to examine the variation in acceleration within and between sets for a standardized free weight exercise. A secondary objective was to examine differences in acceleration between resistance trained and untrained subjects. 'Methods'. Data was collected on 26 female subjects (18 trained and 8 untrained). Subjects performed a standardized exercise (prone dumbbell row involving 3 sets of 10 repetitions with a 2 minutes inter-set rest, at a 12 repetition maximum weight. A 4th set including 2 momentary pauses--one between each repetition and one at the midpoint of the ROM was also performed. Dumbbell acceleration was recorded using a calibrated uniaxial accelerometer (250 Hz sampling rate). (Abstract shortened by UMI.)