“…This equated to an average velocity of 9.5 + 0.5 km.h -1 (2.6 + 0.1 m.s -1 ). Previous studies which have examined the effect of a fatiguing bout of running on subsequent VO 2 during constant-velocity running have all used faster constant velocities which were 12 km.h -1 (Morgan et al, 1990), a mean of 19.0 km.h -1 (Morgan et al, 1996), and 11.3 and 13.7 km.h -1 (Xu and Montgomery, 1995). It was noted by Morgan et al (1994), that at lower velocities, such as the velocity used in the present study, there appeared to be more variation in VO 2 , i.e., less reliability with repeated measurements, which may partly explain the choice of the higher velocities in other studies.…”