Fig. 2.

Average of exercise time (seconds) per 10 min during 3 to 10 weeks of age in ICR mice. Mice were housed in 4 groups and the exercise data represents 4 cages of mice. Enriched exercise includes climbing, passing, and overstepping the three types of obstacles. Other exercise included locomotion and climbing the cage lid without touching the obstacles. In both sexes, there was a significant difference between the enriched exercise group and control (t₂₃₈=5.76; P<0.01, t₂₃₈=3.04; P<0.01), according to unpaired Student’s t-tests. **P<0.01, n=20 per group.