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Fig. 3. Relationship between maximum running speeds and
O2max during (A)
voluntary activity in the wheel and (B) forced exercise on the treadmill,
obtained for 47 female mice. Dotted lines show least-squares linear
regressions for raw data (i.e. not corrected for covariates). Correlations
between
O2max
and speed after accounting for body mass and age are listed in
Table 5.