Department of Human Sciences, Society and Health, University of Cassino and Lazio Meridionale, 03043 Cassino, Italy.
Department of Exercise and Sport Science, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA.
Int J Environ Res Public Health. 2021 Jan 20;18(3):870. doi: 10.3390/ijerph18030870.
Although cycling class intensity can be modified by changing interval intensity sequencing, it has not been established whether the intensity order can alter physiological and perceptual responses. Therefore, this study aimed to determine the effects of interval intensity sequencing on energy expenditure (EE), physiological markers, and perceptual responses during indoor cycling. Healthy volunteers (10 males = 20.0 ± 0.8years; 8 females = 21.3 ± 2.7years) completed three randomly ordered interval bouts (mixed pyramid-MP, ascending intervals-AI, descending intervals-DI) including three 3-min work bouts at 50%, 75%, and 100% of peak power output (PPO) and three 3-min recovery periods at 25% PPO. Heart rate (HR) and oxygen consumption (VO) were expressed as percentages of maximal HR (%HR) and VO (%VO). EE was computed for both the work bout and for the 5-min recovery period. Session Rating of Perceived Exertion (sRPE) and Exercise Enjoyment Scale (EES) were recorded. No differences emerged for % HR (MP = 73.3 ± 6.1%; AI = 72.1 ± 4.9%; DI = 71.8 ± 4.5%), % VO (MP = 51.8 ± 4.6%; AI = 51.4 ± 3.9%; DI = 51.3 ± 4.5%), EE (MP = 277.5 ± 39.9 kcal; AI = 275.8 ± 39.4 kcal; DI = 274.9 ± 42.1 kcal), EES (MP = 4.9 ± 1.0; AI = 5.3 ± 1.1; DI = 4.9 ± 0.9), and sRPE (MP = 4.9 ± 1.0; AI = 5.3 ± 1.1; DI = 4.9 ± 0.9). EE during recovery was significantly ( < 0.005) lower after DI (11.9 ± 3.2 kcal) with respect to MP (13.2 ± 2.5 kcal) and AI (13.3 ± 2.5 kcal). Although lower EE was observed during recovery in DI, interval intensity sequencing does not affect overall EE, physiological markers, and perceptual responses.
虽然通过改变间歇强度序列可以调整自行车运动强度，但尚未确定强度顺序是否会改变生理和感知反应。因此，本研究旨在确定间歇强度序列对室内自行车运动中能量消耗（EE）、生理标志物和感知反应的影响。健康志愿者（10 名男性=20.0±0.8 岁；8 名女性=21.3±2.7 岁）完成了三种随机排序的间歇（混合金字塔-MP、递增间歇-AI、递减间歇-DI），包括三个 3 分钟的工作阶段，强度分别为 50%、75%和 100%的峰值功率输出（PPO），以及三个 3 分钟的恢复期，强度为 25%的 PPO。心率（HR）和耗氧量（VO）表示为最大 HR（%HR）和 VO（%VO）的百分比。计算工作阶段和 5 分钟恢复期的 EE。记录了会话感知用力等级（sRPE）和运动愉悦感量表（EES）。%HR（MP=73.3±6.1%；AI=72.1±4.9%；DI=71.8±4.5%）、%VO（MP=51.8±4.6%；AI=51.4±3.9%；DI=51.3±4.5%）、EE（MP=277.5±39.9 kcal；AI=275.8±39.4 kcal；DI=274.9±42.1 kcal）、EES（MP=4.9±1.0；AI=5.3±1.1；DI=4.9±0.9）和 sRPE（MP=4.9±1.0；AI=5.3±1.1；DI=4.9±0.9）之间没有差异。与 MP（13.2±2.5 kcal）和 AI（13.3±2.5 kcal）相比，DI（11.9±3.2 kcal）后的恢复期 EE 显著（<0.005）降低。尽管 DI 恢复期的 EE 较低，但间歇强度序列不会影响整体 EE、生理标志物和感知反应。
