Cross-validation using the leave-one-out method of regression models in which PAEE (MJ day⁻¹) is the dependent variable.

[Acc2 average acceleration (g) where non-wear time was imputed by all wear-time data at similar time of the day for that participant; RMSE: Root mean square of the error; body side, monitor attachment to dominant wrist vs. non-dominant wrist; ***: p<.001; **: p<.01; *: p<.05; ns: not significant].