Abstract:
:The effects of adaptation to a high-fat diet on endurance performance are equivocal, and there is little data regarding the effects on high-intensity exercise performance. This study examined the effects of a high-fat/moderate protein diet on submaximal, maximal, and supramaximal performance. Twenty non-highly trained men were assigned to either a high-fat/moderate protein (HFMP; 61% fat diet) (n = 12) or a control (C; 25% fat) group (n = 8). A maximal oxygen consumption test, two 30-s Wingate anaerobic tests, and a 45-min timed ride were performed before and after 6 weeks of diet and training. Body mass decreased significantly (-2.2 kg; p < or = .05) in HFMP subjects. Maximal oxygen consumption significantly decreased in the HFMP group (3.5 +/- 0.14 to 3.27 +/- 0.09 L x min(-1)) but was unaffected when corrected for body mass. Perceived exertion was significantly higher during this test in the HFMP group. Main time effects indicated that peak and mean power decreased significantly during bout 1 of the Wingate sprints in the HFMP (-10 and -20%, respectively) group but not the C (-8 and -16%, respectively) group. Only peak power was lower during bout 1 in the HFMP group when corrected for body mass. Despite significantly reduced RER values in the HFMP group during the 45-min cycling bout, work output was significantly decreased (-18%). Adaptation to a 6-week HFMP diet in non-highly trained men resulted in increased fat oxidation during exercise and small decrements in peak power output and endurance performance. These deleterious effects on exercise performance may be accounted for in part by a reduction in body mass and/or increased ratings of perceived exertion.
journal_name
Int J Sport Nutr Exerc Metabauthors
Fleming J,Sharman MJ,Avery NG,Love DM,Gómez AL,Scheett TP,Kraemer WJ,Volek JSdoi
10.1123/ijsnem.13.4.466keywords:
subject
Has Abstractpub_date
2003-12-01 00:00:00pages
466-78issue
4eissn
1526-484Xissn
1543-2742journal_volume
13pub_type
临床试验,杂志文章,随机对照试验abstract:OBJECTIVE:To examine the effects of resistance training on hematological and selected indices of iron status in 17 women aged 54-71 years and 18 men aged 56-69 years. DESIGN:Tests and evaluations were done before and after all subjects participated in a resistance-training program twice weekly for 12 weeks. RESULTS:T...
journal_title:International journal of sport nutrition and exercise metabolism
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abstract::To achieve the criterion appearance before competing in a physique competition, athletes undergo preparatory regimens involving high-volume intense resistance and aerobic exercise with hypocaloric energy intake. As the popularity of "drug-free" competition increases, more athletes are facing this challenge without the...
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journal_title:International journal of sport nutrition and exercise metabolism
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journal_title:International journal of sport nutrition and exercise metabolism
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:International journal of sport nutrition and exercise metabolism
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更新日期:2011-04-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
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