Abstract：
PURPOSE:This study was designed to determine whether serum leptin levels were affected by a 5-d military course after 3 wk of combat training. METHODS:26 male soldiers (mean age = 21 +/- 2 yr) were examined at the beginning of the training program and just at the end of the 5-d course. The combination of continuous heavy physical activity and sleep deprivation led to energy deficiency. Blood samples were analyzed for serum leptin, insulin, cortisol, adrenocorticotropin (ACTH), and testosterone; plasma was analyzed for free fatty acids (FFA), glycerol, glucose, and catecholamines. RESULTS:At the end of the 5-d course, there was a significant reduction in serum leptin (0.40 +/- 0.04 ng x mL(-1) versus 1.47 +/- 0.14 ng x mL(-1), < 0.001), i.e., a mean decrease of 67.00 +/- 3.75%. Plasma norepinephrine and dopamine rose significantly from 296 +/- 17 ng x L(-1) to 672 +/- 48 ng x L(-1) and 23 +/- 3 ng x L(-1) to 40 +/- 5 ng x L(-1) ( < 0.001 and < 0.01, respectively), whereas epinephrine remained unchanged. Serum concentrations of the anabolic hormone, insulin, fell from 31.17 +/- 3.03 microU x mL(-1) to 17.79 +/- 1.58 microU x mL(-1) ( < 0.001), whereas plasma FFA and glycerol were increased ( < 0.001, < 0.05, respectively). A statistically significant correlation appeared between the changes in leptin and insulin (r = 0.5306, < 0.01). Serum testosterone decreased significantly ( < 0.001), whereas serum cortisol, ACTH, and plasma glucose were unchanged at the end of the course. The training program had no significant effect on mean body mass index. CONCLUSION:A 4-wk strenuous military training program, which induced an energy deficiency, reduced serum leptin to a third of normal levels. The decrease in serum leptin was attributed to the exercise-induced elevation in catecholamines and hypoinsulinemia.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Gomez-Merino D,Chennaoui M,Drogou C,Bonneau D,Guezennec CYdoi
10.1097/00005768-200210000-00010subject
Has Abstractpub_date
2002-10-01 00:00:00pages
1594-9issue
10eissn
0195-9131issn
1530-0315journal_volume
34pub_type
杂志文章abstract：:The relationships between individual performance and lactate exchange and removal abilities were studies in 12 male rowers all subjected to three measurements on a rowing ergometer. An incremental exercise carried out to determine the maximal oxygen uptake (VO2max) and the corresponding maximal aerobic power (Pamax), ...
journal_title：Medicine and science in sports and exercise
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doi：10.1097/00005768-199703000-00016
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journal_title：Medicine and science in sports and exercise
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abstract：INTRODUCTION:Slow gait predicts many adverse clinical outcomes in old adults, but the mechanisms of how power training can minimize the age-related loss of gait velocity is unclear. We examined the effects of 10 wk of lower extremity power training and detraining on healthy old adults' lower extremity muscle power and ...
journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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更新日期：1995-02-01 00:00:00
abstract：:1) Many otherwise healthy runners are prevented from participating fully in their chosen endurance sport because of overuse injuries. 2) The most important risk factor for incurring an overuse injury is a training error, such as excessive mileage, sudden change in training distance or intensity, too much hard interval...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/00005768-199209001-00010
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1991-09-01 00:00:00
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,随机对照试验
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1995-09-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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更新日期：2018-09-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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doi：
更新日期：1992-09-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,随机对照试验
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
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journal_title：Medicine and science in sports and exercise
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doi：
更新日期：1983-01-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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doi：
更新日期：1983-01-01 00:00:00
abstract：PURPOSE:To compare the cardiovascular reactivity response to mental challenge of aerobically trained and untrained preadolescent boys. METHODS:Heart rate (HR) and blood pressure, as well as stroke volume, total peripheral resistance, rate pressure product, and cardiac contractility response in 15 aerobically trained (...
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journal_title：Medicine and science in sports and exercise
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journal_title：Medicine and science in sports and exercise
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更新日期：2011-09-01 00:00:00
