Merry K.L., Glaister M., Howatson G., Van Someren K.
School of Science, University of Derby, Kedleston Road, Derby, United Kingdom; School of Sport, Health and Applied Science St Mary's University, Twickenham, United Kingdom; Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon -Tyne, United Kingdom; Water Research Group, School of Environmental Sciences and Development, Northwest University, Potchefstroom, South Africa; GlaxoSmithKline Human Performance Laboratory, Brentford, United Kingdom
Merry, K.L., School of Science, University of Derby, Kedleston Road, Derby, United Kingdom; Glaister, M., School of Sport, Health and Applied Science St Mary's University, Twickenham, United Kingdom; Howatson, G., Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon -Tyne, United Kingdom, Water Research Group, School of Environmental Sciences and Development, Northwest University, Potchefstroom, South Africa; Van Someren, K., GlaxoSmithKline Human Performance Laboratory, Brentford, United Kingdom
Aim. This study evaluated the effects of protocol variation on the time spent exercising at ≥95% . VO2max during cycle ergometer trials performed at the exercise intensity associated with . VO2max (i . VO2max). Methods. Nine male triathletes (age: 32±10 years; body mass: 73.3±6.1 kg; stature: 1.79±0.07 m; . VO2max: 3.58±0.45 L.min-1) performed four exercise tests. During tests 1 and 2, participants performed a maximal incremental cycle ergometer test using different stage durations (1 min and 3 min) for the determination of i . VO2max (1 min) and i . VO2max (3 min). During tests 3 and 4, participants performed a continuous bout of exhaustive cycling at i . VO2max (1 min) (CONT1) and i . VO2max (3 min) (CONT3). Results. i . VO2max (1 min) was signiicantly greater (P<0.001) than i . VO2max (3 min) (340±31 W vs. 299±44 W). Time to exhaustion (TTE) measured during CONT3 was signiicantly longer (P<0.001) than CONT1 (529±140 s vs. 214±65 s). Time spent at . VO2max was signiicantly longer (P=0.036) during CONT3 than CONT1 . (146±158 s vs. 11±20 s), and time spent at ≥95% VO2max was signiicantly longer (P=0.005) during CONT3 than CONT1 (326±211 s vs. 57±51 s). Conclusion. These results show that when exercising continuously at i VO2max, time spent at ≥95% . VO2max is inluenced by the initial measurement of i . VO2max.