title: Calculation of times to exhaustion at 100 and 120% maximal aerobic speed.
abstract: The aim was to compare physiologic responses during exhaustive runs performed on a treadmill at 100 and 120% maximal aerobic speed (MAS: the minimum speed that elicits VO2max). Fourteen subelite male runners (mean +/- SD; age = 27+/-5 years; VO2max = 68.9+/-4.6 ml/kg(-1)/min(-1); MAS = 21.5+/-1 km/h(-1)) participated. Mean time to exhaustion tlim100% at 100% MAS (269+/- 77s) was similar to those reported in other studies. However, there was large variability in individual tlim100% MAS (CV = 29%). MAS was positively correlated with VO2max (r = 0.66, p<0.05) but not with tlim100%) MAS (r = -0.50, p<0.05). tlim100% MAS was correlated with t(lim) at 120% MAS (r = 0.52, p < 0.05) and to blood pH following the rest at 120% MAS (r = -0.68, p<0.05). The data suggest that running time to exhaustion at MAS in subelite male runners is related to time limit at 120% (tlim120%) MAS. Moreover, anaerobic capacity determined by the exercise to exhaustion at 120% MAS can be defined as the variable 'a' in the model of Monod and Scherrer (1954).
authors.affiliation: Faubourg Scaravaglie, Corte, France. renoux@lotus.univ-corse.fr
authors.forename: J C
authors.initials: JC
authors.lastname: Renoux
authors.forename: B
authors.initials: B
authors.lastname: Petit
authors.forename: V
authors.initials: V
authors.lastname: Billat
authors.forename: J P
authors.initials: JP
authors.lastname: Koralsztein
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology; D005080:Exercise Test; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D012420:Running / Q000502:physiology*