International journal of sport nutrition最新文献_第10页

Acute effect of amino acid ingestion and resistance exercise on plasma growth hormone concentration in young men. 氨基酸摄入和抗阻运动对青年男性血浆生长激素浓度的急性影响。

International journal of sport nutrition Pub Date : 1997-03-01 DOI: 10.1123/ijsn.7.1.48

R R Suminski, R J Robertson, F L Goss, S Arslanian, J Kang, S DaSilva, A C Utter, K F Metz

{"title":"Acute effect of amino acid ingestion and resistance exercise on plasma growth hormone concentration in young men.","authors":"R R Suminski, R J Robertson, F L Goss, S Arslanian, J Kang, S DaSilva, A C Utter, K F Metz","doi":"10.1123/ijsn.7.1.48","DOIUrl":"https://doi.org/10.1123/ijsn.7.1.48","url":null,"abstract":"Sixteen men completed four trials at random as follows: (Trial A) performance of a single bout of resistance exercise preceded by placebo ingestion (vitamin C); (Trial B) ingestion of 1,500 mg L-arginine and 1,500 mg L-lysine, immediately followed by exercise as in Trial A; (Trial C) ingestion of amino acids as in Trial B and no exercise; (Trial D) placebo ingestion and no exercise. Growth hormone (GH) concentrations were higher at 30, 60, and 90 min during the exercise trials (A and B) compared with the resting trials (C and D) (p < .05). No differences were noted in [GH] between the exercise trials. [GH] was significantly elevated during resting conditions 60 min after amino acid ingestion compared with the placebo trial. It was concluded that ingestion of 1,500 mg arginine and 1,500 mg lysine immediately before resistance exercise does not alter exercise-induced changes in [GH] in young men. However, when the same amino acid mixture is ingested under basal conditions, the acute secretion of GH is increased.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"7 1","pages":"48-60"},"PeriodicalIF":0.0,"publicationDate":"1997-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.7.1.48","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20020868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 109

Water versus carbohydrate-electrolyte ingestion before and during a 15-km run in the heat. 在高温下跑15公里前和跑中，水和碳水化合物-电解质的摄入。

International journal of sport nutrition Pub Date : 1997-03-01 DOI: 10.1123/ijsn.7.1.26

M Millard-Stafford, L B Rosskopf, T K Snow, B T Hinson

引用次数: 55

The influence of a high carbohydrate intake during recovery from prolonged, constant-pace running. 高碳水化合物摄入对长时间恒速跑步后恢复的影响。

International journal of sport nutrition Pub Date : 1997-03-01 DOI: 10.1123/ijsn.7.1.10

J L Fallowfield, C Williams

引用次数: 25

Increased energy and nutrient intake during training and competition improves elite triathletes' endurance performance. 在训练和比赛中增加能量和营养摄入可以提高优秀铁人三项运动员的耐力表现。

International journal of sport nutrition Pub Date : 1997-03-01 DOI: 10.1123/ijsn.7.1.61

J A Frentsos, J T Baer

{"title":"Increased energy and nutrient intake during training and competition improves elite triathletes' endurance performance.","authors":"J A Frentsos, J T Baer","doi":"10.1123/ijsn.7.1.61","DOIUrl":"https://doi.org/10.1123/ijsn.7.1.61","url":null,"abstract":"Dietary habits were evaluated in 6 elite triathletes (4 male, 2 female). Analysis of 7-day diet records showed mean daily energy and carbohydrate intake to be insufficient to support estimated requirements. Mean intakes of vitamins and most minerals exceeded the Recommended Dietary Allowances (RDAs) except zinc chromium, which did not meet 66% of recommended amounts. Individualized nutrition intervention using the Diabetic Food Exchange System to support performance during training and competition was provided. To improve dietary intake, subjects consumed fortified nutrition supplements (Reliv, Inc.) before and after daily training. Follow-up 7-day diet records showed that average energy intake and percentage of energy from carbohydrate increased, as did intakes of zinc and chromium. Triathletes' performance in a short course triathlon was improved compared to a similar competition completed prior to the nutrition intervention. Following the intervention, triathletes were able to meet recommended daily energy, macronutrient, and micronutrient intakes and improve endurance performance.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"7 1","pages":"61-71"},"PeriodicalIF":0.0,"publicationDate":"1997-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.7.1.61","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20020869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 31

Exercise-induced oxidative stress before and after vitamin C supplementation. 补充维生素C前后运动诱导的氧化应激。

International journal of sport nutrition Pub Date : 1997-03-01 DOI: 10.1123/ijsn.7.1.1

H M Alessio, A H Goldfarb, G Cao

引用次数: 140

The effect of oral vanadyl sulfate on body composition and performance in weight-training athletes. 口服硫酸钒酯对举重运动员身体组成和运动成绩的影响。

International journal of sport nutrition Pub Date : 1996-12-01 DOI: 10.1123/ijsn.6.4.382

J P Fawcett, S J Farquhar, R J Walker, T Thou, G Lowe, A Goulding

{"title":"The effect of oral vanadyl sulfate on body composition and performance in weight-training athletes.","authors":"J P Fawcett, S J Farquhar, R J Walker, T Thou, G Lowe, A Goulding","doi":"10.1123/ijsn.6.4.382","DOIUrl":"https://doi.org/10.1123/ijsn.6.4.382","url":null,"abstract":"The effects of oral vanadyl sulfate (VOSO4) (0.5 mg/kg/day) on anthropometry, body composition, and performance were investigated in a 12-week, double-blind, placebo-controlled trial involving weight-training volunteers. Performance was assessed in the treatment (VS) and placebo (P) groups using 1 and 10 repetitions maximum (RM) for the bench press and leg extension. Thirty-one subjects completed the trial, with 2 VS subjects withdrawing because of apparent side effects. There were no significant treatment effects for anthropometric parameters and body composition during the trial. Both groups had significant improvements in performance but the only significant effect of treatment was a Treatment x Time interaction in the 1 RM leg extension (p = .002), which could have arisen because the VS group had a lower performance at baseline in this test. It was concluded that oral vanadyl sulfate was ineffective in changing body composition in weight-training athletes, and any modest performance-enhancing effect requires further investigation.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"6 4","pages":"382-90"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.6.4.382","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19916402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 46

Body fat percentage and gender: associations with exercise energy expenditure, substrate utilization, and mechanical work efficiency. 体脂率和性别:与运动能量消耗、基质利用和机械功效率的关系。

International journal of sport nutrition Pub Date : 1996-12-01 DOI: 10.1123/ijsn.6.4.356

N L Keim, A Z Belko, T F Barbieri

{"title":"Body fat percentage and gender: associations with exercise energy expenditure, substrate utilization, and mechanical work efficiency.","authors":"N L Keim, A Z Belko, T F Barbieri","doi":"10.1123/ijsn.6.4.356","DOIUrl":"https://doi.org/10.1123/ijsn.6.4.356","url":null,"abstract":"Energy expenditure (EE) was measured at specific steady-state work rates to determine if body fat percentage or gender was associated with exercise EE, substrate oxidation, or work efficiency. Body fat percentage (leaner vs. fatter men, 9-15% vs. 20-25% fat; leaner vs. fatter women, 16-24% vs. 32-48% fat) was not related to work efficiency or submaximal EE. Fatness affected substrate oxidation in men but not in women. Compared to fatter men, leaner men had higher fat oxidation (6.7 +/- 1.6 vs. 1.4 +/- 2.0 mg.kg fat-free mass [FFM]-1.min-1; p < .01) and lower carbohydrate oxidation (26.6 +/- 4.2 vs. 39.3 +/- 5.0 mg.kg FFM-1.min-1; p < .01) at 60% VO2max. When men and women of similar fatness and relative aerobic capacity were compared, men had higher EE measured as kilojoules per minute but similar rates of EE and substrate oxidation per kilogram of FFM at 40-60% VO2max. It was concluded that body FFM, not fatness, is a determinant of exercise EE, whereas fatness is associated with differences in exercise substrate oxidation in men. Along with aerobic fitness, gender and fatness should be considered in future studies of exercise substrate oxidation.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"6 4","pages":"356-69"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.6.4.356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19917716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Free-living, 24-hour, and sleeping energy expenditure in sedentary, strength-trained, and endurance-trained men. 久坐、力量训练和耐力训练男性的自由生活、24小时和睡眠能量消耗。

International journal of sport nutrition Pub Date : 1996-12-01 DOI: 10.1123/ijsn.6.4.370

J L Seale, R S VanZant, J M Conway

{"title":"Free-living, 24-hour, and sleeping energy expenditure in sedentary, strength-trained, and endurance-trained men.","authors":"J L Seale, R S VanZant, J M Conway","doi":"10.1123/ijsn.6.4.370","DOIUrl":"https://doi.org/10.1123/ijsn.6.4.370","url":null,"abstract":"Fifteen adult male volunteers were assigned to sedentary, moderately strength-trained, and moderately endurance-trained groups (5 per group) to determine the effect of exercise training on energy expenditure (EE). Subjects were matched for age, weight, and height. Group appointments were based on activity questionnaires and American College of Sports Medicine standards. Subjects consumed a mixed diet of 40% fat, 20% protein, and 40% carbohydrate at weight maintenance intake for 3 weeks while continuing their exercise training programs. There was no significant difference between groups for 24-hr EE measured in the controlled environment of a room-sized calorimeter. Free-living EE measured with 2H2(18)O in endurance- and strength-trained groups was significantly higher (19.4% and 35.1%, respectively) than in the sedentary group. Moderate endurance and strength training increased free-living EE but did not affect 24-hr EE when groups followed standardized activity schedules. These results suggest that increased EE caused by moderate exercise training is limited to the energy required to complete the exercise.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"6 4","pages":"370-81"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.6.4.370","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19916401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Nutrition knowledge, eating practices, and health of adolescent female runners: a 3-year longitudinal study. 青少年女性跑步者的营养知识、饮食习惯和健康:一项为期3年的纵向研究。

International journal of sport nutrition Pub Date : 1996-12-01 DOI: 10.1123/ijsn.6.4.414

B G Wiita, I A Stombaugh

{"title":"Nutrition knowledge, eating practices, and health of adolescent female runners: a 3-year longitudinal study.","authors":"B G Wiita, I A Stombaugh","doi":"10.1123/ijsn.6.4.414","DOIUrl":"https://doi.org/10.1123/ijsn.6.4.414","url":null,"abstract":"The purpose of this study was to examine changes in nutrition knowledge, intakes, attitudes, and behaviors as well as health status of 22 female adolescent runners. Subjects completed questionnaires, interviews, and dietary analyses twice over a 3-year period. Over this time they experienced physical growth and improved athletic performance. Although their mean score on a test of basic and sports nutrition knowledge remained stable at 67%, after 3 years more runners correctly responded to statements about carbohydrate and fat. However, fewer responded correctly to statements regarding fluid intake and skipping meals. Although runners increased the percentage of calories consumed as carbohydrates, they significantly decreased their mean energy intake, thus lowering carbohydrate intake. They significantly lowered protein, calcium, potassium, and sodium intakes. The incidence of possible eating disorders increased, as did stress fractures. Over 3 years, nutrition knowledge did not improve, the quality of dietary intakes decreased, incidence of eating disorders and stress fractures increased, and menstrual irregularities remained high.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"6 4","pages":"414-25"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.6.4.414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19916405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 67

Disordered eating in female collegiate athletes and collegiate females in an advanced program of study: a preliminary investigation. 大学女运动员和大学女生进食障碍的研究:初步调查。

International journal of sport nutrition Pub Date : 1996-12-01 DOI: 10.1123/ijsn.6.4.391

C D Ashley, J F Smith, J B Robinson, M T Richardson

引用次数: 36