Fig. 2From: Life on holidays: study protocol for a 3-year longitudinal study tracking changes in children’s fitness and fatness during the in-school versus summer holiday periodMock data for changes in aerobic fitness. The blue shaded areas indicate the holiday periods. The black dots are measured values; the white dots are estimated fitness levels when extrapolated to the start, or back-extrapolated to the end of the holiday periodsBack to article page