Table 1

Quality assessment list for prospective cohort studies

Was the selection of the population non-selective with	1 = yes
respect to a healthy or physical functioning?	0 = no
	? = unclear
Were the selected health outcomes clearly described?	1 = yes
	0 = no
	? = unclear
The time between the measurement of physical fitness	1 = yes, >1 year
and the health outcome was at least 1 year	0 = no, ⩽1 year
	? = unclear
Were the results adjusted for confounders?	1 = yes
	0 = no
	? = unclear
Were standard errors and/or confidence intervals given	1 = yes
for the estimates or was information given to calculate	0 = no
these?	? = unclear