Goshozono Mika, Miura Nozomi, Torii Suguru, Taguchi Motoko
Graduate School of Sport Sciences, Waseda University, Tokorozawa, Japan.
Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan.
Front Sports Act Living. 2024 Feb 13;6:1326890. doi: 10.3389/fspor.2024.1326890. eCollection 2024.
Athletes experience high total energy expenditure; therefore, it is important to understand the characteristics of the components contributing to this expenditure. To date, few studies have examined particularly the volume and activity intensity of non-exercise activity thermogenesis (NEAT) in athletes compared to non-athletes under real-life conditions. This study aimed to determine the volume and intensity of NEAT in collegiate athletes. Highly trained Japanese male collegiate athletes ( = 21) and healthy sedentary male students ( = 12) participated in this study. All measurements were obtained during the athletes' regular training season under real-life conditions. NEAT was calculated using metabolic equivalent (MET) data using an accelerometer. The participants were asked to wear a validated triaxial accelerometer for 7 consecutive days. Physical activity intensity in NEAT was classified into sedentary (1.0-1.5 METs), light (1.6-2.9 METs), moderate (3.0-5.9 METs), and vigorous (≥6 METs) intensity. NEAT was significantly higher in athletes than in non-athletes (821 ± 185 kcal/day vs. 643 ± 164 kcal/day, = 0.009). Although there was no significant difference in NEAT values relative to body weight (BW) between the groups (athletes: 10.5 ± 1.7 kcal/kg BW/day, non-athletes: 10.4 ± 2.2 kcal/kg BW/day, = 0.939), NEAT to BW per hour was significantly higher in athletes than in non-athletes (0.81 ± 0.16 kcal/kg BW/h vs. 0.66 ± 0.12 kcal/kg BW/h, = 0.013). Athletes spent less time in sedentary and light-intensity activities and more time in vigorous-intensity activities than non-athletes ( < 0.001, = 0.019, and = 0.030, respectively). Athletes expended more energy on vigorous- and moderate-intensity activities than non-athletes (= 0.009 and = 0.011, respectively). This study suggests that athletes' NEAT relative to BW per day is similar to that of non-athletes, but athletes spend less time on NEAT, which makes them more active in their daily lives when not exercising and sleeping.
运动员的总能量消耗较高；因此，了解构成这种消耗的各组成部分的特点很重要。迄今为止，与非运动员相比，在现实生活条件下，很少有研究专门考察运动员非运动活动产热（NEAT）的量和活动强度。本研究旨在确定大学生运动员的NEAT量和强度。训练有素的日本男性大学生运动员（n = 21）和健康的久坐不动的男性学生（n = 12）参与了本研究。所有测量均在运动员正常训练赛季的现实生活条件下进行。使用加速度计通过代谢当量（MET）数据计算NEAT。要求参与者连续7天佩戴经过验证的三轴加速度计。NEAT中的身体活动强度分为久坐（1.0 - 1.5 METs）、轻度（1.6 - 2.9 METs）、中度（3.0 - 5.9 METs）和剧烈（≥6 METs）强度。运动员的NEAT显著高于非运动员（821±185千卡/天对643±164千卡/天，P = 0.009）。尽管两组之间相对于体重（BW）的NEAT值没有显著差异（运动员：10.5±1.7千卡/千克体重/天，非运动员：10.4±2.2千卡/千克体重/天，P = 0.939），但运动员每小时相对于BW的NEAT显著高于非运动员（0.81±0.16千卡/千克体重/小时对0.66±0.12千卡/千克体重/小时，P = 0.013）。与非运动员相比，运动员在久坐和轻度强度活动上花费的时间更少，在剧烈强度活动上花费的时间更多（分别为P < 0.001、P = 0.019和P = 0.030）。运动员在剧烈和中度强度活动上消耗的能量比非运动员更多（分别为P = 0.009和P = 0.011）。本研究表明，运动员每天相对于BW的NEAT与非运动员相似，但运动员在NEAT上花费的时间更少，这使得他们在不运动和不睡觉的日常生活中更加活跃。
