By assessing the fundamental physiology, it has been shown that the change in tissue oxygen uptake is directly proportional to changes in creatine (Cr) content. Today, innovative technologies such as the portable breath-by-breath gas exchange systems allows researchers to investigate the solicitation of VO 2max during 100 and 200 m sprints in elite runners. This classification is the basis of the century-old constant-speed paradigm applied in laboratories since the discovery of VO 2max by AV Hill in 1923. (3) Power may be extremely high, such that the subject becomes exhausted before sufficient time has elapsed for VO 2 to reach its maximum (i.e., sprint events). (2) Power may be very high or maximal, and sufficient to drive VO 2 to its maximum before exhaustion (i.e., middle-distance events).
(1) Power output may be high (greater than critical speed), but insufficient to elicit VO 2max (i.e., the average marathon speed). Conclusions: By focusing on the solicitation of VO 2max, we demonstrated that the maintenance of VO 2max is possible in the sprint, middle, and marathon distances.Ĭlassically, the solicitation of the maximal uptake of oxygen (VO 2max) was thought only to be possible in the middle-distance (1500 m) events, and not the sprint or the marathon distances. The relevant time spent at VO 2max was only a factor for performance in the 3000 m group, where the Tlim at VO 2max%Ttot was the highest (51.4, r = 0.86, p = 0.003). The time limit (Tlim) at VO 2max on a relative scale of the total time (Tlim at VO 2max%Ttot) during the sprint, middle-distance, and 1500 m was not significantly different ( p > 0.05). Results: VO 2max was elicited and sustained in all distances tested.
Each participant ran one or two different distances (100 m, 200 m, 800 m, 1500 m, 3000 m, 10 km or marathon) in which they are specialists. Methods: Seventy-eight well-trained males (mean age: 32 weight: 73 kg height: 1.80 m) performed the University of Montreal Track Test using a portable respiratory gas sampling system to measure a baseline VO 2max. We tested the hypothesis that VO 2max can be elicited in both the sprint and marathon distances and that the fraction of time spent at VO 2max is not significantly different between distances. Until recently, it was thought that maximal oxygen uptake (VO 2max) was elicited only in middle-distance events and not the sprint or marathon distances.
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