title: The Potential of "Wii Fit Free Jogging" as an Exercise Test.
abstract: OBJECTIVE
  The aim of this study was to investigate the potential use of "Wii™ Fit Free Jogging" (Nintendo(®), Kyoto, Japan) as a tool to estimate aerobic fitness in healthy young adults. It was hypothesized that virtual distance achieved, an outcome reported by the "Wii Fit Free Jogging" game, may be used to estimate aerobic fitness.
  
  
  METHODS
  Two exercise tests using "Wii Fit Free Jogging" were developed: the Wii Jogging Test and the Wii Step Test. For the Wii Jogging Test participants were required to jog on the spot with the aim of achieving the highest virtual distance possible in a given time. For the Wii Step Test participants had the same aim but were required to step up and down a 30-cm step. The construct and criterion validities of these tests were examined in two separate studies. Results were compared with maximal oxygen consumption (VO2max), which was established using the Bruce treadmill protocol. Oxygen consumption and heart rate were measured using an Oxycon™ Mobile indirect calorimeter (Jaeger™; Viasys Healthcare, Hoechberg, Germany) and a Polar heart rate monitor (Polar Electro Oy, Kempele, Finland).
  
  
  RESULTS
  There was no difference between the highest oxygen consumption reached during the Wii Step Test and VO2max (P=0.101). In regression analysis virtual distance results from neither the Wii Jogging Test nor the Wii Step Test contributed to the prediction of VO2max (P=0.235 and P=0.396, respectively).
  
  
  CONCLUSIONS
  In its current form, "Wii Fit Free Jogging" is not suitable for use as an exercise test. Although it elicited near-maximal exertion, there was no valid method of estimating aerobic fitness from virtual distance results.
authors.affiliation: Discipline of Physiotherapy, School of Medicine, Trinity Centre for Health Sciences, St. James's Hospital , Dublin, Ireland .
authors.forename: Cuisle
authors.initials: C
authors.lastname: O'Donovan
authors.affiliation: Discipline of Physiotherapy, School of Medicine, Trinity Centre for Health Sciences, St. James's Hospital , Dublin, Ireland .
authors.forename: John
authors.initials: J
authors.lastname: Gormley
authors.affiliation: Discipline of Physiotherapy, School of Medicine, Trinity Centre for Health Sciences, St. James's Hospital , Dublin, Ireland .
authors.forename: Juliette M
authors.initials: JM
authors.lastname: Hussey