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KMID : 1007520100190041077
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Food Science and Biotechnology
2010 Volume.19 No. 4 p.1077 ~ p.1081
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Effect of Caffeine on the Metabolic Responses of Lipolysis and Activated Sweat Gland Density in Human During Physical Activity
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Kim Tae-Wook
Shin Young-Oh
Lee Jeong-Beom
Min Young-Ki
Yang Hun-Mo
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Abstract
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This study measured caffeine-induced changes in activated sweat gland density (ASGD) and fat oxidation using a randomized crossover design with 10 healthy volunteers given caffeine (Caffe-I, 3 mg/kg ingested 30 min before experiment) and non-caffeine (No-Caff). Subjects were 173.0±3.2 cm in height, 72.5±4.3 kg in weight, and 21.0±2.5 years in age. All experiments were performed in an automated climate chamber (24.0±0.5oC, relative humidity 50±3%, air velocity less than 1 m/sec) between 2-5 p.m. The ASGD on the chest, upper arm, upper back, and lower back were measured (after 30 min running at 60% VO2max), and blood samples were taken (at 40 min before, immediately before and after 30 min running). Activated sweat gland density levels were higher in Caffe-I (Chest p<0.05 and U-Back p<0.01) and free fatty acids (FFA) were higher in Caffe-I compared to No- Caff immediately before (p<0.05) and after running (p<0.01). In summary, caffeine increases ASGD and FFA by stimulating the sympathetic nervous system and increasing of lipolysis.
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KEYWORD
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caffeine, activated sweat gland density (ASGD), free fatty acid, lipolysis, running
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