Abstract:
OBJECTIVE:To examine the efficacy of l-alanyl-l-glutamine ingestion with a commercially available sports drink compared to the sports drink only on time to exhaustion and physiological measures during prolonged endurance exercise. METHODS:Twelve endurance-trained men (23.5 ± 3.7 years; 175.5 ± 5.4 cm; 70.7 ± 7.6 kg) performed 4 trials, each consisting of a 1-hour treadmill run at 75% VO2peak followed by a run to exhaustion at 90% VO2peak. One trial consisted of no hydration (NHY), another required ingestion of only a sports drink (ED), and 2 trials required ingestion of a low dose (LD; 300 mg·500 ml(-1)) and high dose (HD) of l-alanyl-l-glutamine (1 g·500 ml(-1)) added to the sports drink. During the fluid ingestion trials, 250 ml was consumed every 15 minutes. Plasma glutamine, glucose, electrolytes, and osmolality were measured prior to the run (PRE) and at 30, 45, and 60 minutes. VO2, respiratory quotient (RQ), and heart rate (HR) were measured every 15 minutes. RESULTS:Time to exhaustion was significantly longer during the LD and HD trials compared to NHY. No differences were noted in time to exhaustion between ED and NHY. Plasma glutamine concentrations were significantly elevated at 45 minutes in LD and HD trials and remained elevated at 60 minutes during HD. Sodium concentrations increased from the beginning of exercise and remained stable for the duration of the 1-hour run. At 60 minutes, plasma sodium was significantly lower in all trials compared to NHY. CONCLUSIONS:Results indicated that ingestion of the alanine-glutamine dipeptide at either the low or high dose significantly improved time to exhaustion during high-intensity exercise compared to a no-hydration trial.
journal_name
J Am Coll Nutrjournal_title
Journal of the American College of Nutritionauthors
McCormack WP,Hoffman JR,Pruna GJ,Jajtner AR,Townsend JR,Stout JR,Fragala MS,Fukuda DHdoi
10.1080/07315724.2015.1009193subject
Has Abstractpub_date
2015-01-01 00:00:00pages
488-96issue
6eissn
0731-5724issn
1541-1087journal_volume
34pub_type
杂志文章abstract::The report of the National Cholesterol Education Program (NCEP) expert panel on detection, evaluation, and treatment of high blood cholesterol in adults published in 1988 evoked great interest from the medical profession, the public, and food manufacturers. The merits of different dietary interventions to lower plasma...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
doi:10.1080/07315724.1991.10718180
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
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更新日期:2007-08-01 00:00:00
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journal_title:Journal of the American College of Nutrition
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doi:10.1080/07315724.1985.10720088
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,随机对照试验
doi:10.1080/07315724.2007.10719600
更新日期:2007-04-01 00:00:00
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journal_title:Journal of the American College of Nutrition
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pub_type: 杂志文章,评审
doi:10.1080/07315724.2000.10718085
更新日期:2000-04-01 00:00:00
abstract::Lutein and zeaxanthin are xanthophyll carotenoids found particularly in dark-green leafy vegetables and in egg yolks. They are widely distributed in tissues and are the principal carotenoids in the eye lens and macular region of the retina. Epidemiologic studies indicating an inverse relationship between xanthophyll i...
journal_title:Journal of the American College of Nutrition
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
doi:10.1080/07315724.2009.10718109
更新日期:2009-08-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
doi:10.1080/07315724.2015.1080107
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2008.10719711
更新日期:2008-04-01 00:00:00
abstract:PURPOSE:To evaluate and compare the levels of free fatty acids between senile cataract patients and normal controls. METHODS:Fifty consecutive patients with newly diagnosed senile cataract and 50 age- and gender-matched controls were evaluated. Subjects/patients were randomized according to selection criteria. The lev...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2013.875420
更新日期:2014-01-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1996.10718623
更新日期:1996-10-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/07315724.2004.10719354
更新日期:2004-04-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
doi:10.1080/07315724.2014.1003419
更新日期:2016-01-01 00:00:00
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journal_title:Journal of the American College of Nutrition
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doi:10.1080/07315724.2017.1416312
更新日期:2018-07-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1996.10718586
更新日期:1996-04-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1996.10718638
更新日期:1996-12-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2016.1269622
更新日期:2017-05-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1982.10718986
更新日期:1982-01-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1994.10718376
更新日期:1994-02-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/07315724.1991.10718169
更新日期:1991-10-01 00:00:00
abstract::Strength changes, induced by very low-calorie diet (VLCD, 520 kcal/day) alone and in combination with exercise, were determined in 109 severely obese females (46.8 +/- 4.69% fat). Experimental treatments included VLCD alone (LC, n = 40), VLCD with endurance exercise (EE, n = 23), VLCD with endurance exercise and resis...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:
更新日期:1992-04-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2013.875417
更新日期:2014-01-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2020.1848661
更新日期:2020-12-14 00:00:00
abstract::Magnesium is unique among biological cations. Its volume change from hydrated cation to atomic ion is over an order of magnitude larger than that of any other biological cation. This volume change presents particular problems for a magnesium transport system and suggests that these systems may be significantly differe...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,评审
doi:10.1080/07315724.1994.10718431
更新日期:1994-10-01 00:00:00
abstract:OBJECTIVE:Ingesting a mix of glucose and fructose during exercise increases exogenous carbohydrate oxidation while minimizing gastrointestinal (GI) distress. Several studies have suggested that a glucose-to-fructose ratio of 1.2:1 to 1:1 is optimal. No studies have quantified saccharides consumed during a nonsimulated ...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.2014.996830
更新日期:2015-01-01 00:00:00
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journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章,随机对照试验
doi:10.1080/07315724.2014.910740
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVE:We tested the hypothesis that pectin, a source of dietary fiber that delays gastric emptying, increases satiety. METHODS:Male (n = 49) and female (n = 25) US Army employees within normal weight limits were fasted overnight then fed 448 mL of orange juice on 2 separate days followed 4 hours later by 0.473 L o...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1997.10718708
更新日期:1997-10-01 00:00:00
abstract::To examine the relationship between zinc (Zn) status and bone demineralization, a body Zn kinetics study was performed with 74 (37 male, 37 female) disabled persons ranging in age from 16 to 45 years. Three groups were classified according to degree of limited mobility: group 1 (n = 23), capable of walking; group 2 (n...
journal_title:Journal of the American College of Nutrition
pub_type: 杂志文章
doi:10.1080/07315724.1993.10718284
更新日期:1993-02-01 00:00:00