摘要：Background/Objective: The heart rate (HR) and metabolic (VO"2) responses to treadmill running using the GlideTrak(TM) body weight support system have not been reported. The purpose of this study was to compare the submaximal and maximal HR and VO"2 responses to normal-weight treadmill running (TMR) to treadmill running with body weight support provided by the GlideTrak(TM) (GTR). Methods: Twenty participants (11 males; 9 females) 18 to 26 years of age voluntarily participated in this study. Each participant completed two exercise tests in each mode of running: a maximal graded exercise test to compare maximal HR and VO"2 values and a submaximal exercise test to compare the HR-VO"2 relationship. Results: Maximal HR and VO"2 values were significantly (p < 0.001) lower during GTR (183.4 +/- 9.1 bpm, 38.1 +/- 7.2 mL kg^-^1 min^-^1) compared to TMR (194.3 +/- 8.6 bpm, 49.5 +/- 8.9 kg^-^1 min^-^1). There was a significant difference in the HR-VO"2 relationship between GTR and TMR. Compared to TMR, exercising at a HR of 140 bpm resulted in a VO"2 that was 4.0 mL kg^-^1 min^-^1 lower during GTR. At the VO"2 associated with a HR of 140 bpm during TMR, the HR during GTR was 16 bpm higher. During GTR at intensities of exercise up to an RER of 1.0, only 8 participants achieved vigorous intensities of aerobic exercise defined as 64-90% of VO"2max. Conclusion: Exercising with the GlideTrak(TM) body weight support system may not provide the same cardiorespiratory training stimulus as normal-weight treadmill running.
