L-arginine, a semi-essential amino acid, has garnered significant attention for its potential to enhance athletic performance, particularly within endurance sports. Recognized for its multifaceted roles in cardiovascular, immune, and metabolic functions, L-arginine serves as a precursor to biologically active molecules, including nitric oxide (NO), creatine, and polyamines, which are integral to muscle function and recovery. Through its ability to stimulate NO production, L-arginine promotes vasodilation, enhancing blood flow and oxygen delivery to active muscles, thereby improving exercise efficiency and endurance. Additionally, L-arginine influences muscle protein synthesis (MPS) via activation of the mTOR signaling pathway, aids in ammonia detoxification within the urea cycle, and supports cellular energetics by facilitating ATP production. These mechanisms collectively underscore its potential to support prolonged physical exertion, reduce muscle fatigue, and expedite post-exercise recovery. This systematic review examines current evidence on L-arginine supplementation in endurance athletes, focusing on its physiological impacts, mechanisms of action, and potential to enhance recovery and performance. Despite promising findings, variability in individual responses and mixed results across studies highlight the need for refined dosing strategies and further research into long-term safety and efficacy. This review provides a comprehensive overview of L-arginine's potential as a supplement in sports nutrition, aiming to inform evidence-based recommendations for its application in endurance training and recovery strategies.

In recent years, scientific literature has increasingly examined the use of CrossFit in various sports. This paper aims to analyze this literature through bibliometric methods. Searches in the Scopus database from 2000 to January 30, 2024, yielded 567 relevant results. The analysis identified publication dates, prominent authors, affiliations, and key publications, aligning findings with UN goals. Around 75% of articles were published in the last 5 years, indicating rising interest. Results were categorized into sports branches, performance measurement, injuries, nutrition, motivation, and benefits.

Sports nutrition, a dynamic field, benefits competitive athletes. This study examines its evolution through Scopus and Web of Science trends. The authors employed ScientoPy software to analyse various publications, prominent sports (and) nutrition research areas, (pro)active authors in the field, keywords, popular sources, and institutional information. This study exploited the data reconciliation, cluster mapping, webmetric, and scientometric methodologies to analyse 1527 individual entries from the Scopus and Web of Science databases. These databases revealed that the most popular subject matters in the field were "sports nutrition" and "sport Science," with "sports nutrition" having the most 'keynoted' word in most nutrition and dietetics journals since 2019. "Muscle" is the second most popular subject matter in sports and nutrition, demonstrating its reputation in this study area, also experiencing a meteoric rise in popularity since 2019. Our findings showed the top five most popular keywords that gained traction (on a marginal analysis base) were "Sports nutrition," "Exercise," "Sports performance," "Nutrition," and "Dietary supplements." The study's contribution to sports and nutrition is that it grants readers and future researchers a spectrum of past and current sports nutrition trends. Also, the analysis from the study will help future researchers forecast potential industry trends.

Background: Despite the well-documented benefits of exercise and sports participation, young athletes are particularly vulnerable to musculoskeletal injuries. This is especially true during periods of rapid growth, sports specialisation, and high training loads. While injuries are an inevitable aspect of sports participation, the risk can be minimised by promoting the development of strong, resilient tissues through proper nutrition and injury prevention strategies. Moreover, targeted nutrition strategies can accelerate recovery and rehabilitation, allowing for a quicker return to sports participation. Methods: This narrative review synthesises scientific evidence with practical insights to offer comprehensive dietary recommendations aimed at strengthening tissues and supporting the healing process during recovery and rehabilitation. The selection of all sources cited and synthesised in this narrative review were agreed upon by contributing author consensus, experts in sports nutrition (R.A., H.V., B.D.) and exercise and sports medicine (M.H.). Results: Key topics include factors that contribute to injury susceptibility, general dietary recommendations for growth and development, sports nutrition guidelines, and nutrition considerations during injury and rehabilitation. This review also addresses external factors that may lead to suboptimal nutrition, such as food literacy and eating disorders. Conclusions: By highlighting these factors, this article aims to equip coaches, nutritionists, dietitians, athletic trainers, physical therapists, parents/guardians, sporting organisations, and schools with essential knowledge to implement effective nutritional strategies for injury prevention, recovery, and rehabilitation, ultimately enhancing long-term health and athletic performance.

Background. NUKYA was prepared to determine the level of sports nutrition knowledge among people teenagers and adults. Objective. This research aims to translate and validate NUKYA into Indonesian. Method. The Indonesian version of the NUKYA questionnaire was evaluated for content validity and reliability by 6 experts and 30 respondents. The content validity of the questionnaire is measured using the item content validity index and the scale content validity index. The validity and reliability of the instrument were assessed using Pearson Product Moment and Cronbach’s α value. Results. The Indonesian version of NUKYA has an I-CVI of 0.98 and an S-CVI/UA of 0.91; Cronbach’s α 0.74 Conclusions. The Indonesian version of NUKYA is valid and reliable for measuring the level of nutritional knowledge of adolescent and adult athletes in Indonesia.

OBJECTIVES The aim of this study was to investigate hydration awareness among youth baseball players and the effect of sports nutrition education on hydration-related indicators.METHODS Eighty-two youth baseball players who participated in a winter training camp hosted by the Korea Baseball Organization (KBO) participated in this study. A questionnaire was used to assess hydration awareness, and sports nutrition education focused on hydration-related topics was implemented. Hydration-related indicators such as fluid intake and urine color were measured to determine the effect of sports nutrition education.RESULTS Although the hydration awareness of youth baseball players was low, sports nutrition education had a positive effect on changes in fluid intake and urine color during the training camp.CONCLUSIONS Sports nutrition education should be actively implemented in the field to improve hydration awareness and status among youth baseball players.

This study's purpose was to evaluate the relationship between dance training volume, body composition, and habitual diet in female collegiate dancers. Thirty-three female collegiate dancers from three dance programs (20.4 ± 1.05 yrs.; 165.4 ± 11.3 cm, BMI 21.3 ± 3.4 kg/m2) participated in "The Intercollegiate Artistic Athlete Research Assessment (TIAARA)" study. We assessed dance training volume, body composition, and habitual diet. Data were analyzed using descriptive statistics (means ± SD). Two-sample t-tests were conducted to compare reported intake values versus sports nutrition recommendations. Two-tailed Pearson correlations (r) were computed for body composition and dietary intake (p < 0.05). Collegiate dancers were enrolled in 16 ± 2.09 semester credits, with 7.7 ± 3.8 credits as dance movement courses and an additional 3.0 ± 1.5 h/week of rehearsal time. Body composition assessments included fat mass (24.4 ± 6.8%), lean mass (LM) (42.4 ± 10.1 kg), and total body water (32.6 ± 4.6 L). Habitual diets reflected a low-calorie diet (1399 ± 648 kcal/d), with ~20% of dancers consuming a very low-calorie diet (≤1000 kcal/d). Dancers reported under-consuming dietary protein (54.3 ± 26.2 g) and carbohydrate (171.8 ± 77.8 g). LM was positively correlated with daily total energy (r = 0.333), fat (r = 0.37), protein (r = 0.349), and leucine intake (r = 0.352). Our findings emphasize the positive effect of adequate nutritional quantity and quality on body composition in female collegiate dancers.

Endurance events have seen substantial growth in the new millennium, becoming popular activities worldwide. A comprehensive review was conducted based on a PubMed/Medline search focusing on endurance, athletes, nutrition, and performance. This review synthesizes the current evidence on macronutrients, hydration, and supplements for endurance athletes. Recommendations for carbohydrate intake and hydration have remained relatively consistent over the years. In contrast, protein and fat intake has traditionally been underemphasized for endurance athletes. While numerous supplements are available, only a few, such as nitrates, antioxidants, caffeine, and probiotics, show potential benefits for endurance activities and are discussed in this review. This chapter highlights the primary recommendations for macronutrients, hydration, and supplements for endurance athletes. It aims to help clinicians address misconceptions in sports nutrition research and provide informed counseling to endurance athletes.

Nutrigenomics and nutrigenetics combine nutrition, genetics, and sports science to personalize sports nutrition. These fields study how an individual's genetic makeup interacts with specific foods to optimize athletic performance and overall well-being. Genetic variations in energy metabolism, muscle growth, and recovery inform personalized nutrition plans. Through genetic testing, markers linked to nutrient metabolism and performance attributes create comprehensive nutritional profiles for customized dietary approaches. As authors of this manuscript, we are confident that this research contributes to the growing body of literature in sports genomics, providing insights into the genetic basis of athletic performance and paving the way for personalized approaches to sports training and performance optimization. The future of sports nutrition lies in its ability to adapt to the unique genetic makeup of each athlete, providing a tailored roadmap to achieving their highest potential.