Abstract：
:This study compared the bowel function, fecal hemoglobin (Hb) loss, iron status and diets of 36 women of varying activity levels. In addition, we examined the effect of a marathon race on bowel function and fecal Hb loss in 15 of these women. The subjects were divided into 4 groups based on estimated daily exercise energy expenditure: Group A) less than 400 kcal/d (less than 1674 kJ/d); Group B) 400-599 kcal/d (1674-2507 kJ/d); Group C) 600-800 kcal/d (2511-3348 kJ/d); and Group D) greater than 800 kcal/d (greater than 3348 kJ/d). There were no differences in hematological and iron indexes among the 4 groups. Mean daily stool wet weights and individual stool weights were greater for groups B and D as compared to group A. However, transit time and frequency of defecation were not different. Daily fecal Hb losses (mg/day) were greater in groups B, C, and D as compared to A, but there was no difference in fecal Hb concentrations (mg/g feces) among the groups. Dietary intakes of energy, protein, fat and fiber were similar for all groups. Ascorbic acid and iron intakes from food significantly increased with increased estimated daily energy expenditure. Total intakes of ascorbic acid and iron, including oral supplements, were not different among the groups. Marathon racing resulted in a 21% increase in mean transit time, a 27% decrease in daily stool weight and 21% lower frequency of defecation. Fecal Hb concentrations and daily Hb losses before and after the race were not significantly different, despite an increased daily Hb loss in 10 of the 15 runners after the race.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Lampe JW,Slavin JL,Apple FSdoi
10.1055/s-2007-1024663subject
Has Abstractpub_date
1991-04-01 00:00:00pages
173-9issue
2eissn
0172-4622issn
1439-3964journal_volume
12pub_type
杂志文章abstract：:The effects of anabolic agents and training on skeletal muscle are believed to be mediated by a variety of growth and transcription factors. Among these regulatory proteins, insulin-like growth factor-I (IGF-I) and androgen receptor (AR) play a crucial role. The purpose of this study was to investigate the effects of ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2004-820945
更新日期：2004-10-01 00:00:00
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journal_title：International journal of sports medicine
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journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021121
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journal_title：International journal of sports medicine
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更新日期：2008-10-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
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更新日期：2011-12-01 00:00:00
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journal_title：International journal of sports medicine
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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更新日期：2016-06-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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更新日期：1989-12-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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更新日期：1997-02-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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更新日期：2011-11-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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journal_title：International journal of sports medicine
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更新日期：1996-07-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025714
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journal_title：International journal of sports medicine
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pub_type： 临床试验,杂志文章
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
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journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972847
更新日期：1996-05-01 00:00:00
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journal_title：International journal of sports medicine
pub_type： 杂志文章
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更新日期：2010-08-01 00:00:00
