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Is the Energy Expenditure Provided by Exergames Valid?

Ricardo Borges Viana1, Paulo Gentil1, Marília Santos Andrade2

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Energy expenditure (EE) measured by metabolic systems during the Hollywood Workout exergame was nearly double the game's estimated EE. Exercise professionals and users should exercise caution with exergame calorie data.

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Area of Science:

  • Exercise Physiology
  • Human Movement Science
  • Sports Technology

Background:

  • Exergames offer interactive physical activity but may provide inaccurate energy expenditure (EE) estimations.
  • Accurate EE monitoring is crucial for exercise prescription and health management.
  • Previous research has highlighted discrepancies in exergame-based EE calculations.

Purpose of the Study:

  • To evaluate the accuracy of energy expenditure (EE) estimated by the "Hollywood Workout" exergame on Xbox 360 Kinect®.
  • To compare the exergame's EE estimates (EEEx) with EE calculated from direct metabolic measurements (EEMS).

Main Methods:

  • Thirty-four physically active young males participated in the study.
  • Participants performed the "Sports Athlete" protocol within the "Hollywood Workout" exergame.
  • Oxygen uptake (V̇O2) and carbon dioxide production (V̇CO2) were measured using a metabolic system to calculate EEMS.

Main Results:

  • The EEMS was significantly higher than the EEEx, averaging 300.3±53.4 kcal compared to 160.3±16.5 kcal.
  • The metabolic system's EE estimate (EEMS) was 88.6% greater than the exergame's estimate (EEEx).
  • A large effect size (d=3.7) indicated a substantial difference between the two measures.

Conclusions:

  • Exergame-provided energy expenditure data, specifically from "Hollywood Workout," should be interpreted with caution due to significant underestimation.
  • Future research should investigate EE accuracy across a wider range of exergames.
  • Game developers should prioritize precise EE calculation methods for user benefit.