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Fig. 1. Relationship between maximum rates of oxygen consumption
(
O2max; A) and
running speeds (B) during voluntary wheel-running and forced exercise on the
treadmill. Each value represents one of 47 female mice measured over 4
consecutive trial days (see Materials and methods and
Table 1). Dotted lines indicate
equal values. Each point represents the mean highest 60 s recorded for each
individual.