Reducing Body Fat with Altitude Hypoxia Training in Swimmers: Role of Blood Perfusion to Skeletal Muscles

被引:16
作者
Chia, Michael [1 ]
Liao, Chin-An [2 ]
Huang, Chih-Yang [3 ,4 ]
Lee, Wen-Chih [5 ]
Hou, Chien-Wen [2 ]
Yu, Szu-Hsien [2 ]
Harris, M. Brennan [6 ]
Hsu, Tung-Shiung [2 ]
Lee, Shin-Da [7 ,8 ]
Kuo, Chia-Hua [2 ,8 ]
机构
[1] Nanyang Technol Univ, Natl Inst Educ, Singapore 639798, Singapore
[2] Taipei Phys Educ Coll, Lab Exercise Biochem, Taipei 11153, Taiwan
[3] China Med Univ, Inst Med Sci, Taichung 40402, Taiwan
[4] Asia Univ, Dept Hlth & Nutr Biotechnol, Taichung 41354, Taiwan
[5] Shih Hsin Univ, Comm Gen Educ, Taipei 11604, Taiwan
[6] Coll William & Mary, Dept Kinesiol & Hlth Sci, Williamsburg, VA USA
[7] Grad Inst Rehabil Sci, Dept Phys Therapy, Taichung 40402, Taiwan
[8] Asia Univ, Dept Healthcare Adm, Taichung 41354, Taiwan
来源
CHINESE JOURNAL OF PHYSIOLOGY | 2013年 / 56卷 / 01期
关键词
nutrient partitioning effect; adolescence; NIRS; oxygenation; body fat; NEAR-INFRARED SPECTROSCOPY; GLUCOSE-UPTAKE; INSULIN; EXERCISE; RESISTANCE; MASS; CLENBUTEROL; ADENOSINE; TISSUE; FLOW;
D O I
10.4077/CJP.2013.BAA071
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Swimmers tend to have greater body fat than athletes from other sports. The purpose of the study was to examine changes in body composition after altitude hypoxia exposure and the role of blood distribution to the skeletal muscle in swimmers. With a constant training volume of 12.3 km/day, young male swimmers (n = 10, 14.8 +/- 0.5 years) moved from sea-level to a higher altitude of 2,300 meters. Body composition was measured before and after translocation to altitude using dual-energy X-ray absorptiometry along with 8 control male subjects who resided at sea level for the same period of time. To determine the effects of hypoxia on muscle blood perfusion, total hemoglobin concentration (THC) was traced by near-infrared spectroscopy in the triceps and quadriceps muscles under glucose-ingested and insulin-secreted conditions during hypoxia exposure (16% O-2) after training. While no change in body composition was found in the control group, subjects who trained at altitude had unequivocally decreased fat mass (-1.7 +/- 0.3 kg, -11.4%) with increased lean mass (+0.8 +/- 0.2 kg, +1.5%). Arterial oxygen saturation significantly decreased with increased plasma lactate during hypoxia recovery mimicking 2,300 meters at altitude (similar to 93% versus similar to 97%). Intriguingly, hypoxia resulted in elevated muscle THC, and sympathetic nervous activities occurred in parallel with greater-percent oxygen saturation in both muscle groups. In conclusion, the present study provides evidence that increased blood distribution to the skeletal muscle under postprandial condition may contribute to the reciprocally increased muscle mass and decreased body mass after a 3-week altitude exposure in swimmers.
引用
收藏
页码:18 / 25
页数:8
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