“…This study, like others (20), demonstrates that a high VO 2max is required for optimal performance in middle-and long-distance events. However, as previously reported, this variable does not differentiate between elite runners competing in races longer than 1500 m (20), and unlike other variables, such as skinfold thicknesses (15) and left ventricular diameters at end-diastole (19), longitudinal studies have demonstrated that the changes in running performance are not related to changes in VO 2max (17). In light of the previously presented arguments, one could speculate that the determination of the Tlim at vVO 2max or at a specific absolute velocity close to the vVO 2max , the determination of the %VO 2max , and/or the velocity attained for a duration of about 8 minutes would allow investigators to identify differences in the physiological profiles of 3000 m steeplechase and marathon runners.…”