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Sports Performance Supplement

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1861. Physical exercise or micronutrient supplementation for the wellbeing of the frail elderly? A randomised controlled trial. Full Text available with Trip Pro

Physical exercise or micronutrient supplementation for the wellbeing of the frail elderly? A randomised controlled trial. Physical exercise or micronutrien... preview & related info | Mendeley Papers People Groups Search Search Search Journal Article Physical exercise or micronutrient supplementation for the wellbeing of the frail elderly? A randomised controlled trial. MJM C N D EG S et al. See more British Journal of Sports Medicine (2002) 36(2) 126-131 ISSN: N/A Citations Citations (...) term interventions. Author supplied keywords Cite CITATION STYLE APA MJM, C. A. P., N, de J., EG, S., WA, van S., & FJ, K. (2002). Physical exercise or micronutrient supplementation for the wellbeing of the frail elderly? A randomised controlled trial. British Journal of Sports Medicine , 36 (2), 126–131. Retrieved from http://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,shib&db=jlh&AN=106963377&site=ehost-live&scope=site Register to see more suggestions Mendeley helps you to discover

2002 British Journal of Sports Medicine Controlled trial quality: uncertain

1862. Little effect of caffeine ingestion on repeated sprints in team-sport athletes. (Abstract)

performed within 10 s and followed by rest for the remainder of each 10 s. The caffeine and placebo trials followed a familiarization trial, and the time between consecutive trials was 2-3 d. To allow estimation of variation in treatment effects between individuals, nine subjects performed three more trials without a supplement 7-14 d later. We estimated the smallest worthwhile effect on sprint time in a team sport to be approximately 0.8%.Mean time to complete 10 sprints increased by 0.1% (95% likely (...) Little effect of caffeine ingestion on repeated sprints in team-sport athletes. The effect of caffeine ingestion on sprint performance is unclear. We have therefore investigated its effect on performance in a test that simulates the repeated sprints of team sports.In a randomized double-blind crossover experiment, 16 male team-sport athletes ingested either caffeine (6 mg.kg-1 of body mass) or a placebo 60 min before performing a repeated 20-m sprint test. The test consisted of 10 sprints, each

2001 Medicine and science in sports and exercise Controlled trial quality: predicted high

1863. Creatine supplementation and performance in 6 consecutive 60 meter sprints. (Abstract)

Creatine supplementation and performance in 6 consecutive 60 meter sprints. Creatine is an ergogenic aid used in individual and team sports. The aim of this study is to analyze the effect of monohydrate creatine supplementation on physical performance during 6 consecutive maximal speed 60 meter races, and the changes induced in some characteristic biochemical and ventilatory parameters. The study was carried out on nineteen healthy and physically active male volunteers, and randomly distributed (...) into two groups: Group C received a supplement of creatine monohydrate (20 g/day for 5 days) and group P received placebo. Tests were performed before and after supplementation. No significant changes were observed in weight or body water measured by bioimpedance or the sum of 7 skinfold or performance during the 60 meter races. Group C showed a statistically significant increase in plasma creatinine from 69.8 +/- 12.4 to 89.3 +/- 12.4 micromol x L(-1) (p<0.05). In group C in the second control day

2004 Journal of physiology and biochemistry Controlled trial quality: uncertain

1864. Creatine supplementation and multiple sprint running performance. Full Text available with Trip Pro

(p > 0.05) between-group differences in multiple sprint measures of fastest time, mean time, fatigue, or posttest blood lactate concentration. Despite widespread use as an ergogenic aid in sport, the results of this study suggest that creatine monohydrate supplementation conveys no benefit to multiple sprint running performance. (...) Creatine supplementation and multiple sprint running performance. The aim of this study was to examine the effects of short-term creatine monohydrate supplementation on multiple sprint running performance. Using a double-blind research design, 42 physically active men completed a series of 3 indoor multiple sprint running trials (15 x 30 m repeated at 35-second intervals). After the first 2 trials (familiarization and baseline), subjects were matched for fatigue score before being randomly

2006 Journal of strength and conditioning research / National Strength & Conditioning Association Controlled trial quality: uncertain

1865. Effect of caffeine supplementation on repeated sprint running performance. (Abstract)

Effect of caffeine supplementation on repeated sprint running performance. This study examined the effects of 6 mgxkg(-1) caffeine ingestion in team-sport players (N.=10) on repeated-sprint running performance (5 sets of 6 x 20 m) and reaction times, 60 min after caffeine or placebo ingestion.Best single sprint and total set sprint times, blood lactate and simple and choice reaction times (RT) were measured.Total sprint times across sets 1, 3 and 5 (departure every 25 s) were significantly (...) RT, although effect sizes suggested improved post-exercise times after caffeine.Caffeine ingestion 60 min prior to exercise can enhance repeated sprint running performance and is not detrimental to reaction times.

2008 The Journal of sports medicine and physical fitness Controlled trial quality: uncertain

1866. Caffeine supplementation and multiple sprint running performance. Full Text available with Trip Pro

Caffeine supplementation and multiple sprint running performance. The aim of this study was to examine the effects of caffeine supplementation on multiple sprint running performance.Using a randomized double-blind research design, 21 physically active men ingested a gelatin capsule containing either caffeine (5 mg x kg(-1) body mass) or placebo (maltodextrin) 1 h before completing an indoor multiple sprint running trial (12 x 30 m; repeated at 35-s intervals). Venous blood samples were drawn (...) sprint work requires further investigation, the results of the present study show that caffeine has ergogenic properties with the potential to benefit performance in both single and multiple sprint sports.

2008 Medicine and science in sports and exercise Controlled trial quality: uncertain

1867. Carbohydrate-supplement form and exercise performance. (Abstract)

Carbohydrate-supplement form and exercise performance. Numerous studies have shown that ingesting carbohydrate in the form of a drink can improve exercise performance by maintaining blood glucose levels and sparing endogenous glycogen stores. The effectiveness of carbohydrate gels or jellybeans in improving endurance performance has not been examined. On 4 separate days and 1-2 hr after a standardized meal, 16 male (8; 35.8 +/- 2.5 yr) and female (8; 32.4 +/- 2.4 yr) athletes cycled at 75% VO (...) (2peak) for 80 min followed by a 10-km time trial. Participants consumed isocaloric (0.6 g of carbohydrate per kg per hour) amounts of randomly assigned sports beans, sports drink, gel, or water only, before, during, and after exercise. Blood glucose concentrations were similar at rest between treatments and decreased significantly during exercise with the water trial only. Blood glucose concentrations for all carbohydrate supplements were significantly, p < .05, higher than water during the 80-min

2008 International journal of sport nutrition and exercise metabolism Controlled trial quality: uncertain

1868. Phospholipids and sports performance Full Text available with Trip Pro

exercise has been shown to reduce circulatory choline concentrations in some individuals. As choline is a pre-cursor to the neurotransmitter Acetylcholine, this finding has encouraged researchers to investigate the hypothesis that supplementation with PC (or choline salts) could enhance sporting performance. Although the available data that evaluates the effects of PC supplementation on performance are equivocal, acute oral supplementation with PC (~0.2 g PC per kg body mass) has been demonstrated (...) to improve performance in a variety of sporting activities where exercise has depleted circulatory choline concentrations. Short term oral supplementation with soy-derived PS (S-PS) has been reported to attenuate circulating cortisol concentrations, improve perceived well-being, and reduce perceived muscle soreness after exercise. More recently, short term oral supplementation (750 mg per day of S-PS for 10 days) has been demonstrated to improve exercise capacity during high intensity cycling and tended

2007 Journal of the International Society of Sports Nutrition

1869. Creatine serum is not as effective as creatine powder for improving cycle sprint performance in competitive male team-sport athletes. (Abstract)

Creatine serum is not as effective as creatine powder for improving cycle sprint performance in competitive male team-sport athletes. This study examined the effects of supplementation with either creatine monohydrate powder in solution (CP) or a widely available creatine serum (CS) on performance in a repeated maximal sprint cycling test (10 x 6 seconds, 24-second passive rest between sprints). Using a randomized, double-blind, crossover design, 11 competitive male athletes supplemented (...) with creatine in 2 forms according to the manufacturer's recommendations on 2 separate occasions. The 2 supplementation protocols were (a) 20 g.day(-1) x 6 days of creatine powder in solution plus a placebo serum (CP) or (b) 5 ml.day(-1) x 6 days of creatine serum plus a placebo powder (CS). Subjects completed 2 familiarization trials before the 6-day supplementation period. A repeated maximal sprint cycling test was performed prior to and immediately postsupplementation. A 7-week washout period separated

2004 Journal of strength and conditioning research / National Strength & Conditioning Association Controlled trial quality: uncertain

1870. Cardiovascular toxicities of performance-enhancing substances in sports. Full Text available with Trip Pro

Cardiovascular toxicities of performance-enhancing substances in sports. Athletes commonly use drugs and dietary supplements to improve athletic performance or to assist with weight loss. Some of these substances are obtainable by prescription or by illegal means; others are marketed as supplements, vitamins, or minerals. Nutritional supplements are protected from Food and Drug Administration regulation by the 1994 US Dietary Supplement Health and Education Act, and manufacturers (...) are not required to demonstrate proof of efficacy or safety. Furthermore, the Food and Drug Administration lacks a regulatory body to evaluate such products for purity. Existing scientific data, which consist of case reports and clinical observations, describe serious cardiovascular adverse effects from use of performance-enhancing substances, including sudden death. Although mounting evidence led to the recent ban of ephedra (ma huang), other performance-enhancing substances continue to be used frequently

2005 Mayo Clinic Proceedings

1871. 4. The use and misuse of performance-enhancing substances in sport. (Abstract)

4. The use and misuse of performance-enhancing substances in sport. Doctors need to know if a patient is an athlete subject to drug testing, and to be aware of the legal situation surrounding drugs they prescribe such patients. Antidoping laws generally exist in order to provide a safe and fair environment for participation in sport. These laws should prevent and protect athletes from subjecting themselves to health risks through the use of unsafe, but performance-enhancing drugs. Because (...) of difficulties in proving intent to cheat, the World Anti-Doping Agency enforces a principle of strict liability for positive test results for banned substances. An area of major controversy with respect to liability is the "sports supplement" industry, which is poorly regulated when compared with prescription drugs yet is a potential source of doping violations. Medical practitioners can be found guilty of anti-doping violations if they traffic banned drugs, prescribe these to athletes or otherwise assist

2006 Medical Journal of Australia

1872. Positive short-term subjective effect of sports drink supplementation during recovery. (Abstract)

Positive short-term subjective effect of sports drink supplementation during recovery. The aim of this study was to investigate the effects of a naturally composed sports drink containing proteins and carbohydrates used during recovery in competitive badminton players. The hypothesis was that the use of a recovery drink would lead to positive subjective effects, enhanced physical performance and less signs of overtraining.During an in-door season 18 badminton players were instructed to drink (...) with a sports drink during recovery showed a significant short-term subjective positive effect compared with placebo. However, no effects were seen on physical performance or signs of overtraining.

2006 The Journal of sports medicine and physical fitness Controlled trial quality: uncertain

1873. Effects of creatine loading and prolonged creatine supplementation on body composition, fuel selection, sprint and endurance performance in humans. Full Text available with Trip Pro

creatine, creatine phosphate (CrP) and total creatine content ( P <0.05). The subsequent use of a 2 g.day(-1) maintenance dose, as suggested by an American College of Sports Medicine Roundtable, resulted in a decline in both the elevated CrP and total creatine content and maintenance of the free creatine concentration. Both short- and long-term creatine supplementation improved performance during repeated supramaximal sprints on a cycle ergometer. However, whole-body and muscle oxidative capacity (...) Effects of creatine loading and prolonged creatine supplementation on body composition, fuel selection, sprint and endurance performance in humans. Most research on creatine has focused on short-term creatine loading and its effect on high-intensity performance capacity. Some studies have investigated the effect of prolonged creatine use during strength training. However, studies on the effects of prolonged creatine supplementation are lacking. In the present study, we have assessed the effects

2003 Clinical science (London, England : 1979)

1874. Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Full Text available with Trip Pro

Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Creatine supplementation is in widespread use to enhance sports-fitness performance, and has been trialled successfully in the treatment of neurological, neuromuscular and atherosclerotic disease. Creatine plays a pivotal role in brain energy homeostasis, being a temporal and spatial buffer for cytosolic and mitochondrial pools of the cellular energy currency, adenosine (...) triphosphate and its regulator, adenosine diphosphate. In this work, we tested the hypothesis that oral creatine supplementation (5 g d(-1) for six weeks) would enhance intelligence test scores and working memory performance in 45 young adult, vegetarian subjects in a double-blind, placebo-controlled, cross-over design. Creatine supplementation had a significant positive effect (p < 0.0001) on both working memory (backward digit span) and intelligence (Raven's Advanced Progressive Matrices), both tasks

2003 Proceedings. Biological sciences / The Royal Society

1875. Effect of oral creatine supplementation on single-effort sprint performance in elite swimmers. (Abstract)

Effect of oral creatine supplementation on single-effort sprint performance in elite swimmers. Oral supplementation with creatine monohydrate (Cr.H2O) has been reported to increase muscle creatine phosphate levels. The aim of the present study was to determine the effect of such supplementation on performance of a single-effort sprint by elite swimmers. Thirty-two elite swimmers (M = 18, F = 14; age = 17-25 years) from the Australian Institute of Sport were tested on two occasions, 1 week apart (...) . Tests performed were 25-m, 50-m, and 100-m maximal effort sprints (electronically timed with dive start, swimmers performing their best stroke), each with approximately 10 min active recovery. A 10-s maximal leg ergometry test was also undertaken. Swimmers were divided into two groups matched for sex, stroke/event, and sprint time over 50 m, and groups were randomly assigned to 5 days of Cr.H2O supplementation (4 . day-1 x 5 g Cr.H2O + 2 g sucrose, n = 16) or placebo (4 . day-1 x 5 g Polycose + 2 g

1996 International journal of sport nutrition Controlled trial quality: uncertain

1876. Performance-enhancing drugs and supplements in women and girls. (Abstract)

Performance-enhancing drugs and supplements in women and girls. Performance-enhancing substance use has been frequently discussed in the media. High-profile professional athletes have tested positive for performance-enhancing substances, while surveys indicate an escalating incidence of use among amateur athletes. Several articles have reviewed this concern in men's sports; however, this article discusses performance-enhancing drug and supplement use by women and girls.

2007 Current Sports Medicine Reports

1877. Dietary supplementation of high-performance Canadian athletes by age and gender. (Abstract)

Dietary supplementation of high-performance Canadian athletes by age and gender. To determine dietary supplementation practices and opinions, preferred means for dietary supplement (DS) education, and antidoping opinions among elite Canadian athletes varying in age and gender.A descriptive, cross-sectional survey.Elite athlete training centers in Calgary, Canada and surrounding area.A total of 582 high-performance athletes (314 male, 268 female).High-performance athletes representing 27 sports (...) with a mean age of 19.96+/-3.91 years completed a validated questionnaire assessing DS practices and opinions by recall. Sport categories included varsity, Canadian Sport Centre Calgary (CSCC), and National Sport School (NSS).There was extensive DS use, with 88.4% of participants taking>or=1 DS (mean of 3.08+/-1.87 DS per user) during the previous 6 months. Overall, sport drinks (22.4%), sport bars (14.0%), multivitamins and minerals (13.5%), protein supplements (9.0%), and vitamin C (6.4%) were most

2007 Clinical Journal of Sport Medicine

1878. Sports supplements: a modern case of caveat emptor. (Abstract)

Sports supplements: a modern case of caveat emptor. Performance is the combination of favorable genetics, proper training, and a sound approach to nutrition. Athletes attempting to gain a competitive edge often try artificial means of improving speed, strength, and endurance. Although some use oral or injectable medications, others turn to nutritional supplements. This article focuses on some of the most common methods athletes use to enhance performance. Reported dosages, representative (...) studies, and potential side effects are reviewed, along with guidelines for evaluating supplements, and the claims of their manufacturers.

2005 Current Sports Medicine Reports

1879. The efficacy of SPORT as a dietary supplement on performance and recovery in trained athletes. (Abstract)

The efficacy of SPORT as a dietary supplement on performance and recovery in trained athletes. This study investigated the efficacy of SPORT (a popular dietary supplement) in improving performance and assisting recovery in 9 trained athletes. In a double-blind, crossover experiment, subjects ran at workloads of 60 and 80% of peak oxygen uptake (Peak VO2) for 5 min each with 5 min recovery after each bout and at 100% Peak VO2 until exhaustion. Two capsules of either SPORT or a gelatin placebo (...) were administered 1 hr prior to exercise and immediately after each workload. Heart rate (HR) and blood lactate (BLa) were measured at 1 hr prior to exercise, immediately after the 100% exercise bout and at 5, 10, 20, and 45 min during recovery. No significant differences between treatments on HR and BLa measures at any of the 6 time periods, or on subjects' time to exhaustion were found. Under the conditions of this experimental design, SPORT had no beneficial effects on performance or recovery

2000 Canadian journal of applied physiology = Revue canadienne de physiologie appliquée Controlled trial quality: uncertain

1880. Creatine supplementation as an ergogenic aid for sports performance in highly trained athletes: a critical review. (Abstract)

Creatine supplementation as an ergogenic aid for sports performance in highly trained athletes: a critical review. Creatine supplementation has become a common practice among competition athletes participating in different sports over the last few years. The mechanism by which supplementary creatine could have potential ergogenic effects would be an increased muscle creatine and phosphocreatine concentration, leading to a higher rate of ATP resynthesis, a delay in the onset of muscular fatigue (...) , the widespread use of creatine ingestion to improve competition performance does not seem to be justified. The potential interest of creatine supplementation for elite athletes could be related to an increased ability to perform repeated high-intensity exercise bouts, either during training or during competition in sports in which repeated efforts are required (e.g. soccer, basketball), but this possibility needs scientific confirmation.

1998 International Journal of Sports Medicine

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