This study investigates heart rate (HR), in 11 young adults (22.4±3.21yr), at V̇O, to ascertain whether measured maximal heart rate (HR), as determined by a plateau in HR (HR), can reliably confirm V̇O. V̇O and HR were determined, using the parameters of a V̇O≤50 ml•min and a ∆HR≤2b•min, respectively, over the final 60 s of sampling. V̇O was also independently determined using a verification phase protocol. A HR was achieved by 91% of participants (∆HR=1.3±1b•min) and critically the time at which HR was reached coincided with that at which V̇O was achieved. Moreover RER and ΔRER criteria were reached significantly earlier (p<0.05) than V̇O, whilst age-related heart rate maximums (HR), were not achieved by many participants. The results suggest that a HR ≤2 b•min is a more accurate method, within the group tested, to determine whether a 'true' V̇O has been achieved, than other secondary criteria and potentially avoids the requirement for an additional verification phase.
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