Figure 1.

‘Classic’ illustration of variability in the observed responses to exercise training. Individual bars represent observed changes in cardiorespiratory fitness (CRF) for individual participants from a previously published randomized controlled trial (Ross et al., 2015). Observed responses to 24 weeks of a no‐exercise control period (A) or exercise training (B). The exercise training prescription was walking/jogging five times per week at an intensity of 50% baseline cardiorespiratory fitness until 180 (females) or 300 (males) kilocalories were expended.