著者

Masayuki Konishi Masaki Takahashi Naoya Endo Shigeharu Numao Shun Takagi Masashi Miyashita Taishi Midorikawa Katsuhiko Suzuki Shizuo Sakamoto

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.2, no.1, pp.121-126, 2013-03-25 (Released:2013-04-08)

参考文献数

31

被引用文献数

1 2

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The aim of this study was to investigate the effects of one night of sleep deprivation on maximal fat oxidation during a graded exercise test. Ten healthy young males underwent two 2-day control and sleep deprivation trials. Participants were allowed normal sleep from 2300 to 0700 for the control trial, whereas they were required to stay awake for 34 h during the sleep deprivation trial. At 1700 on day 2, participants performed a graded exercise test to exhaustion on a treadmill; this allowed us to determine maximal oxygen uptake and maximal fat oxidation. Before and immediately after the graded exercise test, blood samples were collected in order to measure glucose, insulin, free fatty acid, and triglyceride concentrations. Plasma glucose concentrations were significantly higher in the sleep deprivation trial than in the control trial before the graded exercise test. Serum insulin and free fatty acid concentrations were not significantly different between the two trials. Serum triglyceride concentrations were significantly lower in the sleep deprivation trial than in the control trial. The maximal fat oxidation rate, oxygen uptake, and heart rate at maximal fat oxidation intensity, during the graded exercise test, were not significantly different between the two trials. These findings suggest that maximal fat oxidation during graded exercise is unaffected by one night of sleep deprivation.

著者

TARO YAMAUCHI TAKASHI ABE TAISHI MIDORIKAWA MASAKATSU KONDO

出版者

The Anthropological Society of Nippon

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

vol.112, no.2, pp.179-185, 2004 (Released:2004-08-11)

参考文献数

36

被引用文献数

6 9

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The body mass index [BMI = body weight/height2 (kg/m2)] is widely used as an indicator of obesity. However, BMI is not the best way to assess obesity, because obesity is an excess of body fat, not body weight. The difference between obesity assessments based on BMI and those based on the percentage of body fat (%Fat) causes problems in evaluating extraordinarily large people, such as Sumo wrestlers, who have both a large fat mass and a large muscle mass. We assessed obesity in male college Sumo wrestlers (n = 15) and non-athlete students (n = 20) using BMI and %Fat as reference indices. Anthropometric parameters and resting metabolic rate (in the sitting position) were measured. The mean body weight, BMI, and %Fat for Sumo wrestlers were 125.1 kg, 40.0, and 25.6%, respectively, which were extraordinarily high, as compared to non-athlete students (P < 0.01). All of the Sumo wrestlers were categorized as obese using the BMI criteria proposed by the World Health Organization: eight were ‘severely obese’ (35 ≤ BMI < 40) and seven were ‘very severely obese’ (BMI ≥ 40). However, only 40% of the wrestlers (n = 6) were categorized as obese when %Fat was used as the reference (%Fat > 25%). Furthermore, the body composition chart clearly showed that some Sumo wrestlers were no more adipose than the non-athlete students. Due to their remarkable muscle development, Sumo wrestlers have an excessive fat-free mass. Thus we conclude that it is necessary to consider both BMI and %Fat to assess obesity in excessively muscular people, such as Sumo wrestlers. Furthermore, we propose new criteria and methods for documenting obesity in Sumo wrestlers based on energy metabolism that considers physical activity and dietary intake.

著者

TARO YAMAUCHI TAKASHI ABE TAISHI MIDORIKAWA MASAKATSU KONDO

出版者

The Anthropological Society of Nippon

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

pp.0406280009, (Released:2004-06-29)

被引用文献数

7 9

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The body mass index [BMI = body weight/height2 (kg/m2)] is widely used as an indicator of obesity. However, BMI is not the best way to assess obesity, because obesity is an excess of body fat, not body weight. The difference between obesity assessments based on BMI and those based on the percentage of body fat (%Fat) causes problems in evaluating extraordinarily large people, such as Sumo wrestlers, who have both a large fat mass and a large muscle mass. We assessed obesity in male college Sumo wrestlers (n = 15) and non-athlete students (n = 20) using BMI and %Fat as reference indices. Anthropometric parameters and resting metabolic rate (in the sitting position) were measured. The mean body weight, BMI, and %Fat for Sumo wrestlers were 125.1 kg, 40.0, and 25.6%, respectively, which were extraordinarily high, as compared to non-athlete students (P 25%). Furthermore, the body composition chart clearly showed that some Sumo wrestlers were no more adipose than the non-athlete students. Due to their remarkable muscle development, Sumo wrestlers have an excessive fat-free mass. Thus we conclude that it is necessary to consider both BMI and %Fat to assess obesity in excessively muscular people, such as Sumo wrestlers. Furthermore, we propose new criteria and methods for documenting obesity in Sumo wrestlers based on energy metabolism that considers physical activity and dietary intake.

著者

Shizuo Sakamoto Masayuki Konishi Hyeon Ki Kim Naoya Endoh Masaki Takahashi Syun Takagi Taishi Midorikawa

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.1, no.3, pp.499-504, 2012-09-25 (Released:2012-10-23)

参考文献数

17

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There have been several reports on exercise prescriptions and the effects of exercise on various diseases, particularly for fat metabolism disorder. In recent years, notably from the latter half of the 1990s, studies on effective exercise prescriptions for fat metabolism disorder have taken into account the type of exercise content (type, intensity and duration per session) that has beneficial effects on fat metabolism disorder and the post-exercise recovery period. These studies have analysed the fat oxidation rate as a parameter for examining the beneficial effects of exercise on fat metabolism disorder. In this review, studies, undertaken in Japan and overseas, are introduced that are related to exercise and the fat oxidation rate.