Bloomsburg University of Pennsylvania, 400 East Second Street, Bloomsburg, PA 17815, USA.
University of Pittsburgh, 4200 Fifth Avenue, Pittsburgh, PA 15260, USA.
Physiol Behav. 2019 Jun 1;205:9-14. doi: 10.1016/j.physbeh.2019.02.012. Epub 2019 Feb 11.
Self-selected intensity exercise has resulted in greater affective responses (AR) compared to prescribed exercise of similar intensity and many individuals self-select intensity at a moderate level identified by metabolic analysis. As such, self-selected intensity may be an effective alternative for exercise prescription designed to promote adherence and result in health and fitness benefits. Self-selected intensity has not been well described for many subject populations and exercise modes. Therefore, the purpose of this investigation was to measure affective and metabolic responses during self-selected intensity cycle exercise in college-aged men. Thirty-three men (22.4 ± 2.2 yr) performed a peak oxygen consumption test and a 20 min self-selected trial on a cycle ergometer on separate days. Oxygen consumption (VO) was measured continuously throughout both exercise sessions. AR were measured using the Feeling Scale and ratings of perceived exertion (RPE) using the OMNI Scale every 5 min during the self-selected trial. χ analysis was used to determine if a significant proportion of subjects self-selected intensity above 50% VO reserve (VOR), defined as a threshold for moderate-intensity exercise and potential cardiorespiratory fitness benefits by American College of Sports Medicine. Mean self-selected intensity was 57.6 ± 11.1%VOpeak and 89.3 ± 20.2% of ventilatory threshold. Twenty eight of 33 subjects self-selected intensity above 50% VOR (p < .05). Self-selected intensity was associated with positive AR (1.8 ± 1.4) and mean RPE of 4.0 ± 1.5. In college-aged men, self-selected intensity cycle exercise was performed at a moderate intensity level and elicited positive AR for most subjects. Therefore, self-selected intensity could be an effective component of an exercise prescription for this population.
自主选择的运动强度比规定的相同强度运动产生更大的情感反应 (AR)，并且许多人通过代谢分析选择中等强度的运动。因此，自主选择的运动强度可能是促进依从性并带来健康和健身益处的有效替代方案。对于许多受试者群体和运动模式，自主选择的运动强度尚未得到很好的描述。因此，本研究的目的是测量大学生男性自主选择的运动强度自行车运动中的情感和代谢反应。33 名男性（22.4±2.2 岁）在两天内分别进行了最大摄氧量测试和 20 分钟的自主选择试验。在两次运动过程中连续测量耗氧量 (VO)。在自主选择试验期间，每 5 分钟使用感觉量表 (Feeling Scale) 和 OMNI 量表 (RPE) 测量 AR。使用 χ 分析来确定是否有相当比例的受试者选择强度超过 50% VO 储备 (VOR)，这是美国运动医学学院定义的中等强度运动和潜在心肺健康益处的阈值。平均自主选择强度为 57.6±11.1%VOpeak 和 89.3±20.2%通气阈值。33 名受试者中有 28 名选择的强度超过 50% VOR（p<0.05）。自主选择的运动强度与积极的 AR（1.8±1.4）和平均 RPE 4.0±1.5 相关。在大学生男性中，自主选择的自行车运动强度为中等强度，大多数受试者产生积极的 AR。因此，自主选择的运动强度可以成为该人群运动处方的有效组成部分。
