Fig. 1.

The relationships between age and molecular and performance characteristics. The solid black line denotes the overall linear regression. Dashed lines denote the sex-specific linear regressions. Individual data points are plotted for each subject. a mtDNA deletion frequency (raw values, truncated axis) vs. age. b mtDNA deletion frequency (transformed, normalized) vs. age. c mtDNA copy number (raw values) vs. age. d VO_2max vs. age. e Total lean mass vs. age. f Right leg lean mass vs. age