title: Differentiated perceived exertion and self-regulated wheelchair exercise.
abstract: OBJECTIVE
  To investigate the utility of the differentiated rating of perceived exertion (RPE) for the self-regulation of submaximal wheelchair propulsion in novice users.
  
  
  METHODS
  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.
  
  
  METHODS
  Laboratory facilities at a university.
  
  
  METHODS
  Preliminary population of able-bodied participants with no prior experience of wheelchair propulsion (N=18).
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  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.
authors.affiliation: The Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, Leicestershire, UK.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Paulson
authors.forename: Nicolette C
authors.initials: NC
authors.lastname: Bishop
authors.forename: Roger G
authors.initials: RG
authors.lastname: Eston
authors.forename: Victoria L
authors.initials: VL
authors.lastname: Goosey-Tolfrey
mesh_terms: D000328:Adult; D006233:Persons with Disabilities / Q000534:rehabilitation*; D004867:Equipment Design; D005260:Female; D006339:Heart Rate; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D014910:Wheelchairs; D055815:Young Adult
chemical_list: D019344:Lactic Acid
keywords: %Vo(2peak); ANOVA; BF; BLa; CI(diff); Exercise; ME; PO; Physical exertion; RPE; RPE(C); RPE(O); RPE(P); Rehabilitation; Ve; Vo(2peak); Wheelchairs; analysis of variance; blood lactate concentration; breathing frequency; central rating of perceived exertion; confidence interval of the difference; gross mechanical efficiency; minute ventilation; o(2); overall rating of perceived exertion; oxygen consumption; peak oxygen consumption; percentage of peak oxygen consumption; peripheral rating of perceived exertion; power output; rating of perceived exertion