Boone Jan, Koppo Katrien, Bouckaert Jacques
Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, B-9000 Gent, Belgium.
Respir Physiol Neurobiol. 2008 May 31;161(3):291-7. doi: 10.1016/j.resp.2008.03.008. Epub 2008 Mar 26.
The aim of the study was to test whether ramp slope and training status interact in the oxygen uptake (VO2) response during submaximal ramp exercise. Eight cyclists (VO2 peak=67.8+/-3.7 ml min(-1)kg(-1)) and eight physically active students (PA students) (VO2 peak=49.1+/-4.3 ml min(-1)kg(-1)) performed several ramp protocols, respectively, 25 and 40 W min(-1) for the cyclists and 10, 25 and 40 W min(-1) for the PA students. Vo(2) was plotted as a function of time and work rate up to the gas exchange threshold (GET). Faster ramp elicited a significantly shorter mean response time (MRT) in both groups, and MRT was significantly longer for each ramp protocol in the PA students (126+/-32s, 76+/-15s and 50+/-6s for ramp 10, ramp 25 and ramp 40, respectively) compared to the cyclists (61+/-9s and 40+/-11s for ramp 25 and ramp 40, respectively). Ramp 40 showed less steep Delta VO2/Delta W than ramp 25 in both groups (p<0.01) and Delta VO2/Delta W was less steep for each ramp protocol in PA students (p<0.01) (9.82+/-0.30 ml min(-1)W(-1) and 9.33+/-0.45 ml min(-1)W(-1) for ramp 25 and ramp 40, respectively) compared to cyclists (10.31+/-0.40 ml min(-1)W(-1) and 10.05+/-0.48 ml min(-1)W(-1) for ramp 25 and ramp 40, respectively). In the PA students, Delta VO2/Delta W did not differ between ramp 10 and ramp 25. Statistical analysis showed no interaction effects between ramp slope and training status for MRT (p=0.62) and Delta VO2/Delta W (p=0.35).
本研究的目的是测试在次最大负荷斜坡运动期间，斜坡斜率和训练状态是否会在摄氧量（VO₂）反应中产生相互作用。八名自行车运动员（VO₂峰值 = 67.8 ± 3.7 ml·min⁻¹·kg⁻¹）和八名体育活动活跃的学生（PA学生）（VO₂峰值 = 49.1 ± 4.3 ml·min⁻¹·kg⁻¹）分别进行了几种斜坡运动方案，自行车运动员的运动方案为25 W·min⁻¹和40 W·min⁻¹，PA学生的运动方案为10 W·min⁻¹、25 W·min⁻¹和40 W·min⁻¹。将VO₂绘制为时间和功率的函数，直至达到气体交换阈值（GET）。更快的斜坡在两组中均引起显著更短的平均反应时间（MRT），并且与自行车运动员相比，PA学生中每个斜坡运动方案的MRT均显著更长（斜坡10、斜坡25和斜坡40的MRT分别为126 ± 32秒、76 ± 15秒和50 ± 6秒，而自行车运动员斜坡25和斜坡40的MRT分别为61 ± 9秒和40 ± 11秒）。在两组中，斜坡40的ΔVO₂/ΔW比斜坡25的更平缓（p < 0.01），并且与自行车运动员相比，PA学生中每个斜坡运动方案的ΔVO₂/ΔW都更平缓（p < 0.01）（斜坡25和斜坡40的ΔVO₂/ΔW分别为9.82 ± 0.30 ml·min⁻¹·W⁻¹和9.33 ± 0.45 ml·min⁻¹·W⁻¹，而自行车运动员斜坡25和斜坡40的ΔVO₂/ΔW分别为10.31 ± 0.40 ml·min⁻¹·W⁻¹和10.05 ± 0.48 ml·min⁻¹·W⁻¹）。在PA学生中，斜坡10和斜坡25之间的ΔVO₂/ΔW没有差异。统计分析表明，斜坡斜率和训练状态之间对于MRT（p = 0.62）和ΔVO₂/ΔW（p = 0.35）没有交互作用。
