Maximal exercise data on 6–7 year old children by sex
| Boys (n = 309) | Girls (n = 283) | p Value | |
|---|---|---|---|
| Values are mean (SD). | |||
| RER, Respiratory exchange ratio. | |||
| Heart rate (beats/min) | 196 (9) | 199 (9) | <0.001 |
| RER | 1.05 (0.11) | 1.10 (0.11) | <0.001 |
| V˙o2max (litres/min) | 1.19 (0.18) | 1.06 (0.16) | <0.001 |
| V˙o2max relative to body mass (ml/kg/min) | 48.5 (6.0) | 44.8 (5.6) | <0.001 |
| V˙o2max relative to LBM (ml/kg/min) | 58.2 (6.8) | 57.0 (6.5) | <0.05 |
| V˙o2max relative to body mass (ml/kg0.71/min) | 121.7 (14.5) | 111.2 (12.9) | <0.001 |
| V˙o2max relative to LBM (ml/kg1.105/min) | 42.4 (4.9) | 41.9 (4.8) | NS |