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81. Does Dietary Nitrate Supplementation Improve Aerobic Performance

will be the change in the AT and VO2Max after beetroot juice supplementation. Methods: Patients will undergo an initial CPET and will then be randomized to receive either beetroot juice (BRJ, containing NO3-, 6.2 mmol/day, administered as 500ml Beet it Sport Shots, James White drinks, Ipswich uk) or 'placebo' (PL, NO3-depleted beetroot juice) for 7 days. A second CPET will then be performed. This pilot study will be used to calculate the mean AT and VO2Max and associated standard deviations for our population (...) Does Dietary Nitrate Supplementation Improve Aerobic Performance Does Dietary Nitrate Supplementation Improve Aerobic Performance - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more studies before adding more. Does Dietary Nitrate

2014 Clinical Trials

82. Vitamin D Supplementation and Physical Performance in Adolescent Swimmers. (PubMed)

Vitamin D Supplementation and Physical Performance in Adolescent Swimmers. It is hypothesized that vitamin D insufficiency in athletes might negatively affect sport performance. The objective of this study was to examine the effect of vitamin D3 supplementation on physical performance of adolescent swimmers with vitamin D insufficiency. Fifty-three adolescent competitive swimmers with vitamin D insufficiency (serum 25-hydroxyvitamin-D concentrations (25(OH)D) < 30 ng/ml, mean 24.2 ± 4.8 ng/ml (...) ) were randomized to receive 2,000 IU/day of vitamin D3 or placebo for 12 weeks. Swimming performance at several speeds, arm-grip strength, and one-legged balance, were measured before and after supplementation. The age-adjusted changes in performance variables during the study were compared between groups. 25(OH) D concentrations at study end were significantly higher in the vitamin group compared with the placebo group (29.6 ± 6.5 ng/ml vs. 20.3 ± 4.2 ng/ml, p < .001), yet only 48% of the vitamin

2014 International journal of sport nutrition and exercise metabolism Controlled trial quality: uncertain

83. Effect of lactate supplementation and sodium bicarbonate on 40 km cycling time trial performance. (PubMed)

Effect of lactate supplementation and sodium bicarbonate on 40 km cycling time trial performance. The use of nutritional supplements to improve sporting performance and increase training adaptations is commonplace among athletes and is an expanding market in terms of product choice and availability. The purpose of this study was to examine the effects of 2 ergogenic aids with extracellular blood buffering potential, namely sodium bicarbonate (NaHCO3) and a lactate supplement, during a 40-km (...) supplementation seem to improve 40-km cycling time trial performance. However, the potential benefits following LACTATE regarding perceived exertion require further research.

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2014 Journal of strength and conditioning research / National Strength & Conditioning Association Controlled trial quality: uncertain

84. Beta-alanine supplementation, muscle carnosine and exercise performance. (PubMed)

Beta-alanine supplementation, muscle carnosine and exercise performance. The use of dietary supplements in sports is widespread as athletes are continuously searching for strategies to increase performance at the highest level. Beta-alanine is such a supplement that became increasingly popular during the past years. This review examines the available evidence regarding the optimization of supplementation, the link between beta-alanine and exercise performance and the underlying ergogenic (...) , suggesting it could have a therapeutic potential.On the basis of the millimolar presence of carnosine in mammalian muscles, it must play a critical role in skeletal muscle physiology. The recent number of studies shows that this is related to an improved exercise homeostasis and excitation-contraction coupling. Recent developments have led to the optimization of the beta-alanine supplementation strategies to elevate muscle carnosine content, which are helpful in its application in sports and to potential

2015 Current opinion in clinical nutrition and metabolic care

85. Sport Nutrition Knowledge, Behaviors and Beliefs of High School Soccer Players (PubMed)

, with females using less than males (p = 0.02), while use was twice as likely in Latino vs. White (p = 0.03). Overall, 45% reported their nutrient requirements were different from non-athlete peers. Latinos were less likely (p = 0.03) to report that their diet met nutritional requirements, but more than twice as likely to report that nutritional supplements were necessary for training (p < 0.001). Adolescent athletes, especially females and Latinos, would benefit from sport nutrition education that enhances (...) food selection skills for health and sport performance.

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2017 Nutrients

86. International Society of Sports Nutrition Position Stand: protein and exercise (PubMed)

of essential amino acids (EAAs) and adequate leucine, are most effective in stimulating MPS. Different types and quality of protein can affect amino acid bioavailability following protein supplementation. Athletes should consider focusing on whole food sources of protein that contain all of the EAAs (i.e., it is the EAAs that are required to stimulate MPS). Endurance athletes should focus on achieving adequate carbohydrate intake to promote optimal performance; the addition of protein may help to offset (...) International Society of Sports Nutrition Position Stand: protein and exercise The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein

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2017 Journal of the International Society of Sports Nutrition

87. Creatine Use in Sports (PubMed)

Creatine Use in Sports The use of creatine as a dietary supplement has become increasingly popular over the past several decades. Despite the popularity of creatine, questions remain with regard to dosing, effects on sports performance, and safety.PubMed was searched for articles published between 1980 and January 2017 using the terms creatine, creatine supplementation, sports performance, and dietary supplements. An additional Google search was performed to capture National Collegiate Athletic (...) supplementation for increased performance in short-duration, maximal-intensity resistance training.While creatine appears to be safe and effective for particular settings, whether creatine supplementation leads to improved performance on the field of play remains unknown.

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2017 Sports health

88. International society of sports nutrition position stand: nutrient timing (PubMed)

International society of sports nutrition position stand: nutrient timing The International Society of Sports Nutrition (ISSN) provides an objective and critical review regarding the timing of macronutrients in reference to healthy, exercising adults and in particular highly trained individuals on exercise performance and body composition. The following points summarize the position of the ISSN:Nutrient timing incorporates the use of methodical planning and eating of whole foods, fortified (...) foods and dietary supplements. The timing of energy intake and the ratio of certain ingested macronutrients may enhance recovery and tissue repair, augment muscle protein synthesis (MPS), and improve mood states following high-volume or intense exercise.Endogenous glycogen stores are maximized by following a high-carbohydrate diet (8-12 g of carbohydrate/kg/day [g/kg/day]); moreover, these stores are depleted most by high volume exercise.If rapid restoration of glycogen is required (< 4 h

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2017 Journal of the International Society of Sports Nutrition

89. The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis (PubMed)

The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis Appropriate dietary intake can have a significant influence on athletic performance. There is a growing consensus on sports nutrition and professionals working with athletes often provide dietary education. However, due to the limitations of existing sports nutrition knowledge questionnaires, previous reports of athletes' nutrition knowledge may be inaccurate.An (...) updated questionnaire has been developed based on a recent review of sports nutrition guidelines. The tool has been validated using a robust methodology that incorporates relevant techniques from classical test theory (CTT) and Item response theory (IRT), namely, Rasch analysis.The final questionnaire has 89 questions and six sub-sections (weight management, macronutrients, micronutrients, sports nutrition, supplements, and alcohol). The content and face validity of the tool have been confirmed based

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2017 Journal of the International Society of Sports Nutrition

90. Increasing medical student exposure to musculoskeletal medicine: the initial impact of the Orthopaedic Surgery and Sports Medicine Interest Group (PubMed)

Increasing medical student exposure to musculoskeletal medicine: the initial impact of the Orthopaedic Surgery and Sports Medicine Interest Group To investigate the impact of the Orthopaedic Surgery and Sports Medicine Interest Group (OSSMIG) on medical student interest and confidence in core musculoskeletal (MSK) concepts through supplemental education and experiences at a single tertiary, academic institution.Medical student OSSMIG members at various levels of training were anonymously (...) in MSK medicine, improved confidence in their ability to perform orthopedics-related physical exams, strengthened mentorship with residents and attendings, and developed a connection with the Department of Orthopedic Surgery and its residents (median "Strongly Agree", interquartile range one and two scale items).Since its inception 8 years ago, OSSMIG has been well received and has positively impacted University of Washington School of Medicine students through various interventions. Surgical

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2017 Advances in medical education and practice

91. [VARIABLES USED IN QUESTIONNAIRES ABOUT ERGONUTRITIONALS SUPPLEMENTS INTAKE].

. We performed a descriptive analysis.21 above the 122 identified studies met the inclusion criteria. Sociodemographic factors, sport and training frequency, athlete population, reasons/motives for use and consumption, sources of information and list of supplements and frequency are the found indicators for estimating intake of supplements.there are great heterogeneity in terms of the proposed indicators by the authors at the questionnaires and intake estimation using nutritional supplements (...) [VARIABLES USED IN QUESTIONNAIRES ABOUT ERGONUTRITIONALS SUPPLEMENTS INTAKE]. nutritional supplements intake is increasing during the recent years both in Spain and in the rest of the world. Questionnaires that estimate the intake and supplement use have methodological limitations. The purpose of this study is to describe used indicators in questionnaires that estimate nutritional supplements intake among athletes so facilitate understanding of these limitations.a literature review of variables

2017 Nutricion hospitalaria

92. Effectiveness of whey protein supplements on the serum levels of amino acid, creatinine kinase and myoglobin of athletes: a systematic review and meta-analysis. (PubMed)

Effectiveness of whey protein supplements on the serum levels of amino acid, creatinine kinase and myoglobin of athletes: a systematic review and meta-analysis. Consuming whey protein supplements, along with physiotherapy and psychotherapy, have been recognised in sports performance. Whey protein supplements (WPS) is one of the commonly used supplements as ergogenic aids for athletes to enhance their muscle performance and recovery during sport-related injuries. The purpose of this systematic (...) review is to investigate the effectiveness of WPS over the blood biochemistry mainly amino acids, creatinine kinase and myoglobin which influence performance and recovery among athletes.A comprehensive literature search was conducted to identify randomised control trials (RCTs) and non-RCTs that investigated the effectiveness of WPS on amino acids, creatinine kinase and myoglobin among athletes. Risk of Bias in Non-Randomised Studies of Interventions tool (ROBINS-I) and Cochrane Risk of Bias

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2019 Systematic reviews

93. Testosterone Imposters: An Analysis of Popular Online Testosterone Boosting Supplements. (PubMed)

of improved erections, an elimination of reports of improved work performance, a 67% decrease in reports of improved sleep, and an 89% decrease in reports of improved sports ability.Our study can serve as a guide for providers to counsel patients about the efficacy of popular online T-Boosters as well as the prevalence of disingenuous reviews associated with these products on online marketplaces like Amazon.com.Strengths include the novel approach to assess consumers' perceptions and satisfaction of T (...) Testosterone Imposters: An Analysis of Popular Online Testosterone Boosting Supplements. Testosterone-boosting supplements (T-Boosters) are prominently featured on Amazon.com, with numerous dedicated pages and claims that they "naturally" increase testosterone levels.To evaluate the highest rated and frequently reviewed T-Boosters on Amazon.com to facilitate patient counseling regarding marketing myths, T-Booster formulations, and evidence for efficacy and safety.The Amazon marketplace

2019 Journal Of Sexual Medicine

94. Effects of polyphenol (carob) supplementation on body composition and aerobic capacity in taekwondo athletes. (PubMed)

Effects of polyphenol (carob) supplementation on body composition and aerobic capacity in taekwondo athletes. Herbal products and supplements use by athletes has increased over the past decade. One such item being polyphenols. These are reported to reduce weight and modify body composition, which could aid athletes in many sports. Therefore, the purpose of the study was to determine the effect of 6 weeks supplementation with carob, a naturally occurring polyphenol, on body composition (...) decreases in weight were observed for SG and PG (-2.82% and - 0.51%respectively) with differences between groups (p < 0.001). No significant differences were reported in percentage body fat and muscular volume between groups. Our results revealed an improvement of aerobic performance score and RPE with differences between groups. A cute polyphenol supplementation seemed to be effective in reducing body weight and improving aerobic performance in athletes.Copyright © 2019 Elsevier Inc. All rights

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2019 Physiology & behavior Controlled trial quality: uncertain

95. Acute Effects of L-Arginine Supplementation on Oxygen Consumption Kinetics and Muscle Oxyhemoglobin and Deoxyhemoglobin during Treadmill Running in Male Adults. (PubMed)

Acute Effects of L-Arginine Supplementation on Oxygen Consumption Kinetics and Muscle Oxyhemoglobin and Deoxyhemoglobin during Treadmill Running in Male Adults. L-arginine is used as a nitric oxide related supplement intended to improve sports performance, and to enhance muscular recovery during exercise. However, the literature is inconclusive. The aim of this study was to determine the effects of acute oral L-arginine supplementation on O2 consumption kinetics and local muscle blood volume (...) conditions for O2 kinetics as well as for NIRS variables. ARG supplementation does not improve physiological responses associated with oxygen cost and NIRS variables during running treadmill tests. Hence, our results do not support the use of L-arginine as an ergogenic aid for running performance in young healthy males.

2019 International journal of exercise science Controlled trial quality: uncertain

96. Consumption of Nitrate-Rich Beetroot Juice with or without Vitamin C Supplementation Increases the Excretion of Urinary Nitrate, Nitrite, and (PubMed)

sports performances. (...) Consumption of Nitrate-Rich Beetroot Juice with or without Vitamin C Supplementation Increases the Excretion of Urinary Nitrate, Nitrite, and Consumption of nitrate-rich beetroot juice (BRJ) by athletes induces a number of beneficial physiological health effects, which are linked to the formation of nitric oxide (NO) from nitrate. However, following a secondary pathway, NO may also lead to the formation of N-nitroso compounds (NOCs), which are known to be carcinogenic in 39 animal species

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2019 International journal of molecular sciences Controlled trial quality: uncertain

97. Influence of Hyperoxic-Supplemented High-Intensity Interval Training on Hemotological and Muscle Mitochondrial Adaptations in Trained Cyclists. (PubMed)

and considering the O2 delivery limitation at exercise intensities near to maximum, we hypothesized that hyperoxic-supplemented high-intensity interval training (HIIT) would upregulate muscle mitochondrial oxidative capacity and enhance endurance cycling performance compared to training in normoxia. Methods: 23 trained cyclists, age 35.3 ± 6.4 years, body mass 75.2 ± 9.6 kg, height 179.8 ± 7.9 m, and VO2max 4.5 ± 0.7 L min-1 performed 6 weeks polarized and periodized endurance training on a cycle ergometer (...) mitochondria: HYPER 26.1 ± 80.1%, NORM 15.9 ± 73.3%; p = 0.66, ES = 0.51), or markers of mitochondrial content which were similar between groups post intervention. Conclusions: This study showed that 6 weeks hyperoxic-supplemented HIIT led to marginal gain in cycle performance in already trained cyclists without change in VO2max, blood volume, hemoglobin mass, mitochondrial oxidative phosphorylation capacity, or exercise efficiency. The underlying mechanisms for the potentially meaningful performance

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2019 Frontiers in physiology Controlled trial quality: uncertain

98. Prevalence of, and factors associated with health supplement use in Dubai, United Arab Emirates: a population-based cross-sectional study. (PubMed)

population in Dubai, UAE.A cross-sectional household telephone survey using a computer-assisted questionnaire was conducted amongst a random representative sample (n = 1203) of the Dubai population that assessed HS use and knowledge. Dependent variables were supplement use and reports of adverse events while independent variables included socio-demographic factors, knowledge, attitudes, and practice. Logistic regression analysis was performed to identify factors independently associated with HS use.Among (...) Prevalence of, and factors associated with health supplement use in Dubai, United Arab Emirates: a population-based cross-sectional study. Health supplement (HS) products that are available in the Emirate of Dubai (United Arab Emirates; UAE) contain chemicals that may adversely affect human health. This study aimed to investigate the prevalence of, and factors associated with HS consumption, knowledge, related adverse events, and reporting practices of adverse events amongst the general

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2019 BMC Complementary and Alternative Medicine

99. Eligibility and Disqualification Recommendations for Competitive Athletes With Cardiovascular Abnormalities: Task Force 11: Drugs and Performance-Enhancing Substances

and substances, or doping, is one of the most important and difficult challenges in contemporary sports. Doping occurs when a prohibited substance or its metabolite is documented in a bodily specimen or when a prohibited method is used to increase athletic performance. Most commonly, the substances or methods used for doping have not been evaluated for therapeutic use. The abuse of counterfeit or designer drugs that are not regulated is a particular threat to the athlete’s health. Doping also threatens (...) at the international and national level with regard to detection, deterrence, and prevention of doping, a World Anti-Doping Code has been accepted by almost all international athletic organizations. Ultimately, all stakeholders, including athletic governing organizations, athletes, trainers, and physicians, have a shared responsibility to discourage the use of doping in sports. The evidence base for performance-enhancing drugs and substances is subject to limitations not usually encountered in the assessment

2015 American Heart Association

100. Harvard researchers’ speculative, poop-based sports drink company raises questions about conflicts of interest

Chemical Society (ACS): . A probiotic elixir based on elite athlete poop The news release and a at the ACS meeting had an alluring hook: Certain bacteria show up more often in the poop of elite athletes than in the poop of sedentary people. So researchers theorized that a probiotic elixir containing components of elite athlete poop could help boost athletic performance and become the next hot sports drink. An intriguing concept, for sure. But as Roehr pointed out, there was no published research, so (...) Harvard researchers’ speculative, poop-based sports drink company raises questions about conflicts of interest 'Fitbiomics' raises questions about Harvard conflict of interest policies Note to our followers: Our nearly 13-year run of daily publication of new content on HealthNewsReview.org came to a close at the end of 2018. Publisher Gary Schwitzer and other contributors may post new articles periodically. But all of the 6,000+ articles we have published contain lessons to help you improve

2017 HealthNewsReview

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