Figure 1.

Mean pedometer steps per day, girls and boys combined for each measurement year from grade 2 (age 8 years) to grade 6 (age 12 years). The left Y axis represents the square root of steps per day used for statistical analysis and the non linear right Y axis represents actual steps per day.

Telford et al. International Journal of Behavioral Nutrition and Physical Activity 2013 10:81   doi:10.1186/1479-5868-10-81
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