Fig. 2From: The importance of cardiorespiratory fitness and sleep duration in early CVD prevention: BMI, resting heart rate and questions about sleep patterns are suggested in risk assessment of young adults, 18–25 yearsa. The figure shows the relation of sleep duration (hours per night) in quartiles and cardiorespiratory fitness measured as estimated maximal oxygen uptake, VO2 max. b. The figure shows the relation of sleep duration (hours per night) and body mass index (BMI). In both figures the box shows the 25–75 percentiles and the whiskers the entire span from 0 to 100 percentiles. The colours change expresses the median lineBack to article page