A comparison of the VO2 kinetic response between 400- and 1500-metre track athltes to supramaximal treadmill running
University of Wales Institute Cardiff
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The aim of the present study was to investigate if a difference existed in the time course of 400- and 1500m track athletes in response to supramaximal treadmill running. Methods: Twelve collegiate level male athletes consisting of seven 400-metre sprinters (mean ± SD 400: age 20.7 ± 1.4 yr; VO2max 62.8 ± 6.7 mL·kg·min; Personal best 50.08 ± 0.65 seconds) and five 1500-metre middle distance athletes (mean ± SD 1500: age 21 ± 0.9 yr; VO2max 73.16 ± 4.6 mL·kg·min; Personal best 4.06 ± 0.2.5 minute, seconds) were used as subjects in the investigation. Each subject completed an initial incremental state VO2max treadmill test to determine maximal treadmill velocity at VO2max. Subsequent exercise transitions of 3 minutes at 110% of peak 2OV&max treadmill velocity (km h-1.) to represent supramaximal intensity treadmill running were then used as a means of modelling the VO2 response to supramaximal intensity running. Pulmonary gas measurement was measured breath-by-breath and H.R was taken at 5-s intervals. Results: T-tests revealed that no significant difference (P= 0.1993) exists between the mean τ response exists between 400- and 1500-metre athletes in the supramaximal intensity domain. The homogenous populations exhibited significantly different VO2max scores (P value =0.017) and final minute H.R (P-value 0.0075). Conclusions: From the responses exhibited by the two populations assumptions can be that the τ in response to supramaximal treadmill running is not a function of an athletes VO2max. Any differences in VO2 kinetics observed between the two populations could be attributed to varying central and peripheral adaptations induced by the varying training methods for the two events although no significant difference existed.
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