The effects of playground markings on the energy expenditure of 5-7-year-old school children

The energy expenditure of 47 children aged 5-7 years was assessed before and after a school playground was painted with fluorescent markings. Physical activity was measured using heart rate monitors and energy expenditure calculated for 3 playtimes per child before and after the playground was painted. Total energy expenditure and the rate of energy expenditure increased significantly, as did the duration of play. The effect of painting the playground on total energy expenditure was analysed using an ANCOVA to control for play duration and body mass. Results revealed a 35% increase in total energy expenditure (P less than or equal to.01) and a 6% increase in the rate of energy expenditure (P less than or equal to.01). The significant interaction between time (before and after) and group (experimental and control) (P less than or equal to.02) demonstrated that the intervention programme significantly increased heart rates. These results suggest that playground markings and duration of play can have a significant and positive influence on young children's energy expenditure.