Regulating intensity using perceived exertion in spinal cord-injured participants.
OBJECTIVE
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 (.)VO2peak 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 (.)VO2peak, 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 (.)VO2 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 (.)VO2, 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.
Goosey-Tolfrey
Victoria
V
Loughborough University, School of Sport Exercise and Health Sciences, Loughborough, UK. v.l.tolfrey@lboro.ac.uk
Lenton
John
J
Goddard
Jimmy
J
Oldfield
Victoria
V
Tolfrey
Keith
K
Eston
Roger
R
D000328:Adult; D004867:Equipment Design; D005080:Exercise Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods; D010101:Oxygen Consumption / Q000502:physiology; D010465:Perception; D005082:Physical Exertion / Q000502:physiology*; D013119:Spinal Cord Injuries / Q000503:physiopathology* / Q000534:rehabilitation; D019876:Sports Equipment; D011795:Surveys and Questionnaires; D014910:Wheelchairs; D055815:Young Adult