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ERIC Number: EJ870149
Record Type: Journal
Publication Date: 2009-Mar
Pages: 9
Abstractor: As Provided
Reference Count: 54
ISSN: ISSN-0270-1367
No Change of Body Mass, Fat Mass, and Skeletal Muscle Mass in Ultraendurance Swimmers after 12 Hours of Swimming
Knechtle, Beat; Knechtle, Patrizia; Kaul, Rene; Kohler, Gotz
Research Quarterly for Exercise and Sport, v80 n1 p62-70 Mar 2009
We evaluated whether ultraendurance swimmers suffer a change of body mass, fat mass, skeletal muscle mass, total body water, and specific gravity of urine during a 12-hr swim in 12 male Caucasian ultraswimmers. Proton nuclear magnetic resonance of urine samples before and after the race was performed to detect alanine, lactate, and 3-hydroxybutyrate. The 12 swimmers achieved an average distance of 29.4 km (SD = 5.1). No statistically significant changes in body mass, fat mass, skeletal muscle mass, and total body water could be determined (p greater than 0.05), but urine gravity decreased significantly (p less than 0.001). Two participants showed increased signals of ketone bodies after the race. In these samples, the hydroxybutyrate-creatinine ratio increased more than tenfold. (Contains 5 figures.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Switzerland