Regulating Intensity Using Perceived Exertion in Spinal Cord-Injured Participants

Victoria Louise Goosey Tolfrey; John P. Lenton; Jimmy Goddard; Victoria Oldfield; Keith Tolfrey; Roger G. Eston

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Regulating Intensity Using Perceived Exertion in Spinal Cord-Injured Participants

Victoria Goosey-Tolfrey ^[1] ; John Lenton ^[1] ; Jimmy Goddard ^[1] ; Victoria Oldfield ^[1] ; Keith Tolfrey ^[1] ; Roger Eston ^[2]
1. [1] Loughborough University
  
  Loughborough University
  
  Charnwood District, Reino Unido
2. [2] Exeter University, School of Sport and Health Sciences, Exeter, United Kingdom
Localización: Medicine & Science in Sports & exercise: Official Journal of the American College of Sports Medicine, ISSN 0195-9131, Vol. 42, Nº. 3, 2010, págs. 608-613
Idioma: inglés
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Resumen
- Purpose:
  
  To examine the validity of perception-based intensity regulation during handcycling exercise.
  
  Methods:
  
  Eight spinal cord-injured (T11 incomplete to T4 complete) participants completed an incremental exercise test followed by a V˙O2peak test using a sports hand bike. Subsequently, two 20-min exercise tests were completed at an individualized power output (PO) at moderate and vigorous intensities (50% and 70% of V˙O2peak, respectively). On a separate occasion, participants were instructed to produce and maintain a workload equivalent to the average RPE for the 20-min imposed condition in a counterbalanced order. The V˙O2 and blood lactate concentration [BLa−] were measured every 10 min, and HR and PO were measured at 1-min intervals.
  
  Results:
  
  There were no differences in average V˙O2, percent V˙O2peak, HR, PO, and [BLa−] between the imposed PO conditions and RPE-regulated trials of either exercise intensity. Although PO increased slightly during the moderate-intensity RPE-regulated trial (P < 0.04), it remained relatively constant in the vigorous RPE-regulated trial. However, there was a tendency for PO to be slightly higher (P = 0.07) in the vigorous RPE-regulated trial.
  
  Conclusions:
  
  These data suggest that RPE is effective in controlling moderate and vigorous intensities throughout a 20-min handcycling exercise session for SCI participants.