Continuous handrail support, oxygen uptake, and heart rate in women during submaximal step treadmill exercise

Past research suggests that continuous handrail support during exercise attenuates physiologic responses to exercise and reduces aerobic benefits; however, this phenomenon has not been systematically studied in women exercising on the step treadmill. The effects of three levels of handrail support (continuous light, continuous very light, dr no handrail support) on oxygen uptake and heart rate during step treadmill exercise were examined in 15 healthy women. Measures were obtained during 6 bouts of exercise, 3 bouts at 25 steps/min followed by 3 bouts at 33 steps/min. At both step rates, mean oxygen uptake was significantly reduced during continuous light and continuous very light handrail support as compared with no handrail support, and mean heart rate was significantly reduced during continuous light versus no handrail support. At 25 steps/min only, mean heart rate was significantly reduced during continuous very light versus no handrail support. Findings indicate that women who use even continuous light or continuous very light handrail support attenuate physiologic responses during step treadmill exercise, thereby reducing aerobic requirements and gaining suboptimal benefits from exercise. (C) 2000 John Wiley & Sons, Inc.