Abstract des Autors

Lower back discomfort is common among users of standard vertical stair-climbing machines. A partially reclined stair-climbing machine (PRSC) has been designed to provide more comfort and protection to the lower back while providing the same exercise benefits. Ten individuals were recruited to exercise on both machines while their erector spinae electromyographic activity and heart rates were recorded. There was no significant difference (p<.05) in erector spinae muscle activity during exercise on either machine. Workout intensity levels necessary to achieve target heart rates were established during a familiarization session and tracked during exercise. The mean heart rates for both groups remained withing the target zones throughout the exercise sessions, but a nonsignificant (p>0.05) trend toward increased heart rate on both machines was observed in the women participants. Because of the high incidence of low back pain and injury, we need exercise modalities that provide both cardiovascular and muscular fitness development without placing additional stress on this region. Verf.-Referat