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Objective To compare the energy expenditure of adolescents when playing sedentary and new generation active computer games.

Design Cross sectional comparison of four computer games.

Setting Research laboratories.

Participants Six boys and five girls aged 13-15 years.

Procedure Participants were fitted with a monitoring device validated to predict energy expenditure. They played four computer games for 15 minutes each. One of the games was sedentary (XBOX 360) and the other three were active (Wii Sports).

Main outcome measure Predicted energy expenditure, compared using repeated measures analysis of variance.

Results Mean (standard deviation) predicted energy expenditure when playing Wii Sports bowling (190.6 (22.2) kJ/kg/min), tennis (202.5 (31.5) kJ/kg/min), and boxing (198.1 (33.9) kJ/kg/min) was significantly greater than when playing sedentary games (125.5 (13.7) kJ/kg/min) (P<0 …