Fig 2. Means (95% confidence interval) of scores in the 36-item Short-Form Health Survey (SF-36) in patients with low and high fitness level according to the median value for flexibility (1.35 cm in the back scratch test), cardiorespiratory fitness (CRF; 575 m in the 6-min walk test), upper body strength (28.28 kg/cm² in the handgrip test) and lower body strength (15 repetitions in the 30-sec chair stand test).

Differences between groups were studied using analysis of covariance (ANCOVA) with age, body mass index, depression scores and general fatigue entered as covariates. *p≤0.05 **p≤0.01 *** p≤0.001.