title: Recumbent stepper submaximal exercise test to predict peak oxygen uptake.
abstract: OBJECTIVE
  The purpose of this study was to examine the ability of the YMCA submaximal exercise test protocol using a total body recumbent stepper to predict V˙O(2peak).
  
  
  METHODS
  Of 112 individuals initially screened, 110 individuals with low to moderate cardiovascular disease risk met the inclusion criteria for participation in the study. The maximal exercise test used a motorized treadmill and the Bruce or modified Bruce protocol. Oxygen uptake was measured and analyzed through collection of expired gases using a metabolic measurement system. The submaximal exercise test was performed at least 24 h later but no more than 5 d after maximal exercise testing. Participants were instructed to keep a pace of 100 steps per minute and the resistance increase every 3 min according to the protocol until fatigue, or until 85% of HR max was achieved. A cross-validation study was also performed to determine the accuracy of the prediction equation.
  
  
  RESULTS
  Using a stepwise regression, we report that V˙O(2peak) can be predicted using a five-element model including age, weight, sex, wattsend_submax, and HRend_submax (F5,69 = 70.31, P < 0.001). We report a strong correlation between the predicted V˙O(2peak) to the actual V˙O(2peak).
  
  
  CONCLUSIONS
  These data suggest the YMCA submaximal exercise test can be used with the total body recumbent stepper to predict V˙O(2peak) in healthy adults.
authors.affiliation: Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS 66160, USA. sbillinger@kumc.edu
authors.forename: Sandra A
authors.initials: SA
authors.lastname: Billinger
authors.forename: Ellie
authors.initials: E
authors.lastname: VAN Swearingen
authors.forename: Megan
authors.initials: M
authors.lastname: McClain
authors.forename: Angela A
authors.initials: AA
authors.lastname: Lentz
authors.forename: Mathew B
authors.initials: MB
authors.lastname: Good
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000378:metabolism; D010101:Oxygen Consumption / Q000502:physiology*; D055815:Young Adult
chemical_list: D010100:Oxygen