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Figure 2


Fig. 2. Relationship between metabolic rate (VO2, ml min-1) and speed (m min-1) for a single male hopping mouse (body mass=31.5 g). The break-point of the regression relating VO2 and speed is equal to maximum aerobic speed (Umax, m min-1). At slower speeds, the slope of the line relating VO2 and speed is equal to the net O2 cost of transport (ml O2 m-1). Average VO2 at speeds greater than Umax is equal to maximum metabolic rate (VO2max, ml min-1). N=12. Below 21.8 m min-1, VO2=1.80+0.100U, where U is speed; above 21.8 m min-1, VO2=3.98.





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