Figure 4.

Vitamin D impacts on balance, gait speed, and activity levels. Additional physical performance characteristics were examined monthly in aged mice receiving varied vitamin D supplementation including: balance and coordination as the average time of the 2 best of 3 trials on a rotarod device that accelerates from 4 to 40 RPM over 5 min (A), gait speed as the average of the best 2 of 3 times to travel 1 meter (B), and activity as the total number of quadrant crossings (C) and rearings (D) in an open field arena in 30 min. “*” indicates p < 0.05 for 8000 IU versus baseline and “†” p < 0.001 for all groups versus baseline.