Hoorn, T. van (Tim) (2017) The relation between power output and heart rate distributions during handcycling. thesis, Sport Sciences.
Full text available on request.Abstract
Study design: Observational study Objective: The aim of the present study was to compare handcyclists’ heart rate (HR) distributions with their power output (PO) distributions during the HandbikeBattle (HBB) and the training period before the HBB. The goal was to examine whether the HR can determine the actual exercise intensity during handcycling. Method: Seventeen handcyclists performed a laboratory incremental exercise test. Their HRrest, HRpeak, POpeak, HR and PO at ventilatory threshold (VT1) and respiratory compensation point (RCP) were assessed. The percentages of time spent in the intensity zones based on HR and PO distributions were compared over three and seven zones. Moreover, the percentage heart rate reserve (%HRR) at threshold values of the VT1 and RCP were compared with the 50%-85% HRR zone that the American College of Sports Medicine (ACSM) recommends to develop cardiorespiratory fitness. Results: Thirteen of the seventeen handcyclists showed a significant interaction effect over the three zones and all handcyclists over the seven zones, indicating that the percentage of time spent in the zones during the sessions was different when based on HR or PO. Furthermore, the VT1 of the handcylists was significantly higher (M=71.50, SD=9.86, p=<0.001) compared to the intensity (50% HRR) that the ACSM described as the minimum intensity to develop cardiorespiratory fitness. The mean RCP of all handcyclists was not significantly different (M=86.92, SD=5.86, p=0.196) from the ACSM’s upper threshold value (85% HRR). Conclusion: Within handcyling, there was little agreement between the percentages of time spent in the intensity zones regarding the HR and PO. This suggests that is it hard to use the HR to determine actual exercise intensity (PO or rate of VO2). Furthermore, the 50-85 %HRR described by the ACSM to develop cardiorespiratory fitness was not in accordance with the handcyclists’ %HRR at VT1 and RCP, although the upper threshold value was equivalent to the handcyclists’ RCP. Keywords: handcycling; heart rate; heart rate reserve; power output; upper-body exercise
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Kouwijzer, I. (Ingrid) and Groot, dr. S. de |
| Faculty: | Medical Sciences |
| Date Deposited: | 06 May 2022 12:03 |
| Last Modified: | 06 May 2022 12:04 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3239 |
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