Article

OBJECTIVE: To investigate the utility of the differentiated rating of perceived
exertion (RPE) for the self-regulation of submaximal wheelchair propulsion in
novice users. DESIGN: Each participant completed a submaximal incremental test
and a graded test to exhaustion to determine peak oxygen consumption (Vo(2)peak)
on a wheelchair ergometer.
On a separate day, two 12-minute intermittent bouts
consisting of three 4-minute stages were completed at individualized imposed
power outputs equating to light (40% Vo(2)peak) and moderate (60% Vo(2)peak)
intensity exercise. On a third occasion, participants were assigned to either the
overall group or the peripheral group and were required to self-regulate
12-minute intermittent exercise according to either overall RPE or peripheral RPE
reported during the corresponding imposed intensity trial. SETTING: Laboratory
facilities at a university. PARTICIPANTS: Preliminary population of able-bodied
participants with no prior experience of wheelchair propulsion (N=18).
INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Differences in oxygen
consumption (Vo(2)), heart rate, blood lactate concentration, and power output
between the imposed and self-regulated exercise trials. RESULTS: No difference
was found in physiological responses between the moderate-intensity imposed and
RPE-regulated trials in the peripheral group, whereas a significant (P<.05)
underproduction in Vo(2) (1.76+/-.31 vs 1.59+/-.25L/min) and blood lactate
concentration (2.8+/-0.90 vs 2.21+/-.83mmol/L) was seen in the overall group. In
contrast, a significant (P<.05) overproduction was seen in the peripheral group
at a light exercise intensity, whereas no difference was found between all
variables during the light-intensity imposed and RPE-regulated trials in the
overall group. CONCLUSIONS: Peripheral RPE enabled a more precise self-regulation
during moderate-intensity wheelchair exercise in novice users. In contrast,
overall RPE provided a more accurate stimulus when performing light-intensity
propulsion.
CI - Copyright (c) 2013 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS