International journal of sport nutrition最新文献

Inosine supplementation has no effect on aerobic or anaerobic cycling performance. 肌苷补充对有氧或无氧循环性能没有影响。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.333

L McNaughton, B Dalton, J Tarr

{"title":"Inosine supplementation has no effect on aerobic or anaerobic cycling performance.","authors":"L McNaughton, B Dalton, J Tarr","doi":"10.1123/ijsn.9.4.333","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.333","url":null,"abstract":"The two basic aims of this study were to add to the limited literature concerning Inosine as an ergogenic aid, and to determine the effects of Inosine supplementation over a period of 5 and 10 days, at a dosage of 10,000 mg.d-1 on measures associated with aerobic and anaerobic performance. Seven trained, volunteer male subjects (body mass = 63.0 +/- 8.7 kg, VO2max = 67.9 +/- 3.3 ml.kg-1.min-1) participated in this study. The subjects completed three test sessions, each comprising three tests (5 x 6-s sprint, 30-s sprint, and 20-min time trial). Supplementation was carried out in a random, double-blind manner, and the test sessions were undertaken prior to (Baseline, B), on Day 6, and on Day 11. Blood was sampled prior to supplementation as well as on Days 6 and 11 and was analyzed for uric acid and 2,3 DPG. An analysis of the data indicated no performance benefit of supplementation and no improvement in 2,3 DPG concentration. Uric acid concentration increased significantly after both Days 6 and 11 (p < 0.03 and p < 0.004, respectively). It is concluded that Inosine has no ergogenic effects but may cause possible health problems if taken over long periods of time.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"333-44"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.333","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515255","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: 35

A report of vitamin and mineral supplement use among university athletes in a division I institution. 某一级机构大学运动员维生素和矿物质补充剂使用情况报告。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.416

C J Krumbach, D R Ellis, J A Driskell

{"title":"A report of vitamin and mineral supplement use among university athletes in a division I institution.","authors":"C J Krumbach, D R Ellis, J A Driskell","doi":"10.1123/ijsn.9.4.416","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.416","url":null,"abstract":"The influences of gender, ethnicity, and sport of varsity athletes on their vitamin/mineral supplementation habits were examined. Subjects included 145 females and 266 males from 22 varsity teams; 80% were Caucasian; 12% African American; and 8% Combined-Other. Over half of the subjects took supplements. Males were more likely than females to give \"too expensive\" as a reason for not taking supplements, and \"improve athletic performance\" and \"build muscle\" as reasons for taking supplements. The most common supplement was multivitamins plus minerals. Females were more likely to take calcium and iron, and males vitamins B12 and A. African Americans were the most likely to take vitamin A. Males were more likely to get supplement information from nutritionists/dietitians and self, and females from family members or friends and physicians or pharmacists. Football players were more likely to get supplement information from nutritionists/dietitians, and males in other sports from coaches/trainers. There were some differences in vitamin/mineral supplement habits of the athletes by gender, ethnicity, and sport.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"416-25"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.416","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515175","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: 118

Effect of ENDUROX on metabolic responses to submaximal exercise. endenrox对亚极限运动代谢反应的影响。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.434

S N Cheuvront, R J Moffatt, K D Biggerstaff, S Bearden, P McDonough

引用次数: 12

Resting metabolic rate and thermogenic effect of glucose in trained and untrained girls age 11-15 years. 11-15岁训练和未训练女孩静息代谢率和葡萄糖的产热效应。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.378

K Burkhard-Jagodzinska, K Nazar, M Ladyga, J Starczewska-Czapowska, L Borkowski

{"title":"Resting metabolic rate and thermogenic effect of glucose in trained and untrained girls age 11-15 years.","authors":"K Burkhard-Jagodzinska, K Nazar, M Ladyga, J Starczewska-Czapowska, L Borkowski","doi":"10.1123/ijsn.9.4.378","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.378","url":null,"abstract":"Twelve girls who trained in rowing were examined twice a year for 4 years. Their initial age was 11.7 +/- (SD) 0.2 yrs. Control groups consisted of 13 girls age 11.5 +/- 0.3 yrs and 18 girls age 14.4 +/- 0.3 yrs examined simultaneously with trained girls in the first and last year of the study, respectively. The examination involved basic anthropometry, estimation of sexual maturation (Tanner scale), 2-day food records, measurements of resting metabolic rate, energy expenditure following glucose ingestion (50 g), and determinations of blood glucose and plasma insulin concentrations prior to and 2 hrs after glucose load. Body mass, height, and fat content were slightly greater in trained girls. None of the subjects reported disturbances in menstrual function, and the age of menarche was similar for all. Both trained and untrained girls reported similar daily energy intake closer to the lower limit or slightly below the estimates of energy requirements for adolescents. Resting metabolic rate calculated per kg of total body mass or lean body mass was lower in trained girls, while the thermogenic effect of glucose was greater. Plasma insulin concentrations measured 2 hrs after glucose ingestion were lower in trained girls. The results suggest that in circumpubertal girls, increased physical activity leads to energy conservation at rest in postabsorptive state and a tendency toward enhancement of food-induced thermogenesis.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"378-90"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.378","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515259","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: 8

Patterns of vitamin/mineral supplement usage by adolescents attending athletic high schools in Korea. 韩国参加体育高中的青少年使用维生素/矿物质补充剂的模式

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.391

S H Kim, C L Keen

{"title":"Patterns of vitamin/mineral supplement usage by adolescents attending athletic high schools in Korea.","authors":"S H Kim, C L Keen","doi":"10.1123/ijsn.9.4.391","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.391","url":null,"abstract":"An excessive use of vitamin/mineral supplements is considered by many to be a common health problem. We surveyed 1,355 adolescent boys and girls attending athletic high schools in Korea for their usage patterns of vitamin/mineral supplements. The usage rate of the vitamin/mineral supplements was 35.8%. The most favored supplements were vitamin C, multivitamins, and calcium. The reasons most cited for taking supplements were \"to recover from fatigue,\" and \"to maintain health.\" Vitamin and mineral intakes occurred over a wide range; mean intake values were typically higher than the Korean RDA. Vitamins B1, B12 and C were consumed in very high amounts at 29.7, 17.9 and 11.1 times the Korean RDA, respectively. When the intakes of nutrients from supplements and diet were combined, it was observed that the intakes of niacin, folic acid, vitamin C, and iron exceeded levels that have been proposed as upper safe limits. The above data underscore the need to provide sound nutritional education to athletic adolescents and their coaches with respect to the use of vitamin/mineral supplements and the links between adequate diet, good health, and physical performance.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"391-405"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.391","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515260","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: 49

Intestinal permeability in runners in the 1996 Chicago marathon. 1996年芝加哥马拉松比赛选手的肠通透性。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.426

R D Smetanka, G P Lambert, R Murray, D Eddy, M Horn, C V Gisolfi

{"title":"Intestinal permeability in runners in the 1996 Chicago marathon.","authors":"R D Smetanka, G P Lambert, R Murray, D Eddy, M Horn, C V Gisolfi","doi":"10.1123/ijsn.9.4.426","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.426","url":null,"abstract":"Abdominal cramping, nausea, diarrhea, and GI bleeding are often reported in long-distance runners. This study set out to determine the effects of prolonged (2-4 hrs) exercise and NSAID ingestion on gastric and intestinal permeability during the first 5 hrs following the 1996 Chicago Marathon. Thirty-four healthy volunteers (20 M, 14 F; ages 30-50) completed the race and ingested the test solution (5 g sucrose, 5 g lactulose, 2 g rhamnose, in 40 ml water) within 10-15 min. The urinary excretion ratio of lactulose/rhamnose was used to assess small intestine permeability; sucrose excretion was used to evaluate gastric impairment. There were no significant differences for mean training mileage, postrace rectal temperature, and percent dehydration between runners who ingested NSAIDs and those who did not. In all, 75% of subjects reported aspirin or ibuprofen ingestion before or during the race. Runners who ingested ibuprofen had significant elevations in urinary lactulose excretion and lactulose/rhamnose ratio, whereas those who ingested aspirin or who did not ingest either NSAID had no significant differences in urinary excretion of lactulose, rhamnose, sucrose, or lactulose/rhamnose ratio compared to resting controls. Thirteen of the 26 NSAID users and 4 of the 8 non-users reported GI symptoms. It is concluded that (a) ibuprofen but not aspirin ingestion during prolonged exercise may increase gastrointestinal permeability and lead to GI symptoms, and (b) prolonged exercise alone can produce GI symptoms.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"426-33"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515176","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: 60

Nutritional and physiological status of U.S. national figure skaters. 美国国家花样滑冰运动员的营养和生理状况。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.345

P J Ziegler, J A Nelson, S S Jonnalagadda

{"title":"Nutritional and physiological status of U.S. national figure skaters.","authors":"P J Ziegler, J A Nelson, S S Jonnalagadda","doi":"10.1123/ijsn.9.4.345","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.345","url":null,"abstract":"This study assessed the nutrient intake, body composition and biochemical indices of National Figure Skating Championship competitors. Four-day diet records, fasting blood samples, and anthropometric measurements were obtained 2 months after the National Championships from 41 figure skaters 11-18 years of age. Energy, carbohydrate, fat, dietary fiber and cholesterol intake were significantly lower compared to the NHANES III averages for adolescents in the U.S. In general, the mean intakes for most vitamins except vitamin D and E were above the recommended intake. But the athletes had lower intakes of vitamin E and B12, and higher intakes of vitamin C, and thiamin (females only) compared with NHANES III. The mean intakes of magnesium, zinc, and iodine by the male skaters were below the recommended levels, as were the mean intakes of calcium, iron, phosphorus, magnesium, and zinc by the female skaters. Also, the number of servings from vegetable, fruit, dairy, and meat groups were below the recommended levels. Biochemical indices of nutritional status were within normal limits for all skaters. But plasma electrolyte concentrations were indicative of potential dehydration status. The results suggest there is a need to develop dietary intervention and educational programs targeted at promoting optimal nutrient and fluid intakes by these athletes to maintain performance and improve long-term health status.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"345-60"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515256","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: 51

Glycogen replenishment and repeated maximal effort exercise: effect of liquid carbohydrate. 糖原补充和重复最大努力运动:液体碳水化合物的影响。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.406

M D Haub, J A Potteiger, D J Jacobsen, K L Nau, L A Magee, M J Comeau

引用次数: 31

Acute carbohydrate consumption does not influence resistance exercise performance during energy restriction. 在能量限制期间，急性碳水化合物消耗不影响阻力运动的表现。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.319

R A Dalton, J W Rankin, D Sebolt, F Gwazdauskas

引用次数: 7

Influence of caffeine on metabolic and cardiovascular functions during sustained light intensity cycling and at rest. 咖啡因对持续低强度骑行和休息时代谢和心血管功能的影响。

International journal of sport nutrition Pub Date : 1999-12-01 DOI: 10.1123/ijsn.9.4.361

H J Engels, J C Wirth, S Celik, J L Dorsey

{"title":"Influence of caffeine on metabolic and cardiovascular functions during sustained light intensity cycling and at rest.","authors":"H J Engels, J C Wirth, S Celik, J L Dorsey","doi":"10.1123/ijsn.9.4.361","DOIUrl":"https://doi.org/10.1123/ijsn.9.4.361","url":null,"abstract":"This study assessed the influence of caffeine on metabolic and cardiovascular functions during sustained, light intensity cycling and at rest. Eight healthy, recreationally active adults participated in four randomly assigned, double-blind experimental trials of 60 min upright seated cycle exercise (30% VO2 max) or equivalent rest with caffeine (5 mg.kg-1) or placebo consumed 60 min prior to data collection. Gas exchange was measured by open-circuit spirometry indirect calorimetry. Global blood flow was evaluated by thoracic impedance cardiography and arterial blood pressure by auscultation. A repeated measures ANOVA indicated that pretrial caffeine increased oxygen uptake and energy expenditure rate (p < 0.05) but did not change respiratory exchange ratio. Systolic, diastolic, and mean arterial blood pressure were elevated following caffeine intake (p < 0.05). Cardiac output, heart rate, stroke volume, and systemic vascular resistance were not significantly different between caffeine and placebo sessions. For each of the metabolic and hemodynamic variables examined, the effects of caffeine were similar during constant-load, light intensity cycling and at rest. These data illustrate that caffeine's mild thermogenic influence can be mediated without a major shift in substrate oxidation mixture. Caffeine at this dosage level alters cardiovascular dynamics by augmenting arterial blood pressure.","PeriodicalId":14321,"journal":{"name":"International journal of sport nutrition","volume":"9 4","pages":"361-70"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1123/ijsn.9.4.361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21515257","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: 49