在乳酸阈强度下进行十二周有氧运动可改善肥胖女性的自主神经系统功能、身体成分和有氧能力。
Twelve Weeks of Aerobic Exercise at the Lactate Threshold Improves Autonomic Nervous System Function, Body Composition, and Aerobic Performance in Women with Obesity.
作者信息
Park Hun-Young, Jung Won-Sang, Kim Jisu, Hwang Hyejung, Lim Kiwon
机构信息
Department of Sports Medicine and Science, Graduate School, Konkuk University, Seoul, Korea.
Physical Activity and Performance Institute, Konkuk University, Seoul, Korea.
出版信息
J Obes Metab Syndr. 2020 Mar 30;29(1):67-75. doi: 10.7570/jomes19063.
BACKGROUND
The present study examined the effects of a prolonged exercise intervention at the lactate threshold (LT) on body composition, aerobic performance, and the autonomic nervous system (ANS) in women with obesity.
METHODS
A total of 36 obese Korean women aged 36 to 55 years (mean±standard deviation, 44.8±5.2 years) were randomly assigned to a control group (CON, n=18) or an experimental group (EXP, n=18); and EXP underwent aerobic exercise training three times a week at a heart rate corresponding to the LT (HR_LT) for 12 weeks. All dependent variables (body composition, aerobic performance, and ANS function parameters) were evaluated before and after training.
RESULTS
Compared with the CON group, the EXP group showed significant improvement in body composition (body weight, -4.57 vs. -2.40 kg; body mass index, -1.79 vs. -0.96 kg/m; %body fat, -4.63 vs. -1.41; fat-free mass, 3.24 vs. -0.08 kg), aerobic performance (oxygen consumption at LT, 5.74 vs. 0.12 mL/kg/min; maximal oxygen consumption, 5.41 vs. 2.14 mL/kg/min; treadmill speed at HR_LT, 1.40 vs. 0.29 km/hr; bicycle load at HR_LT, 18.62 vs. 4.52 w; and ANS function (mean RR, 50.83 vs. -15.04 ms; standard deviation of NN intervals, 5.08 vs. -0.55 ms; root mean square of successive differences, 6.42 vs. 1.87 ms; total power, 0.34 vs. 0.10 ms; high frequency, 0.32 vs. -0.04 ms; low frequency/high frequency, -0.09 vs. 0.01).
CONCLUSION
Aerobic exercise at the LT for 12 weeks is a practical method of improving body composition, aerobic performance, and ANS function for women with obesity.
背景
本研究探讨了在乳酸阈（LT）下进行长期运动干预对肥胖女性身体成分、有氧能力和自主神经系统（ANS）的影响。
方法
总共36名年龄在36至55岁之间的韩国肥胖女性（平均±标准差，44.8±5.2岁）被随机分为对照组（CON，n = 18）或实验组（EXP，n = 18）；实验组每周进行三次有氧运动训练，运动心率对应于乳酸阈（HR_LT），持续12周。在训练前后对所有因变量（身体成分、有氧能力和ANS功能参数）进行评估。
结果
与对照组相比，实验组在身体成分（体重，-4.57 vs. -2.40 kg；体重指数，-1.79 vs. -0.96 kg/m²；体脂百分比，-4.63 vs. -1.41；去脂体重，3.24 vs. -0.08 kg）、有氧能力（乳酸阈时的耗氧量，5.74 vs. 0.12 mL/kg/min；最大耗氧量，5.41 vs. 2.14 mL/kg/min；HR_LT时跑步机速度，1.40 vs. 0.29 km/hr；HR_LT时自行车负荷，18.62 vs. 4.52 w）和ANS功能（平均RR，50.83 vs. -15.04 ms；NN间期标准差，5.08 vs. -0.55 ms；逐次差值均方根，6.42 vs. 1.87 ms；总功率，0.34 vs. 0.10 ms；高频，0.32 vs. -0.04 ms；低频/高频，-0.09 vs. 0.01）方面均有显著改善。
结论
在乳酸阈下进行12周的有氧运动是改善肥胖女性身体成分、有氧能力和ANS功能的一种实用方法。
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