Table 3.

Overall and point estimates of validity for the Mywellness Key

Stage	n	MAPE (SD)	CoV (%)
1 light activity	100	12.08% ± 9.03%	11.39
2 moderate	100	15.17% ± 9.66%	11.75
3 moderate	100	16.53% ± 10.13%	12.58
4 vigorous	100	21.10% ± 19.08%	18.59
1–3 light + moderate	300	14.60% ± 9.77%	12.60
1–4 all stages	400	16.22% ± 13.03%	16.92

Notes: Assessments were calculated from estimated VO₂ in mL/kg per minute from the MWK compared with respiratory gas exchange values.

Abbreviations: n, sample size; MAPE, mean absolute percent error; MWK, Mywellness Key; SD, standard deviation; CoV, coefficient of variance.