Optimizing Sports Nutrition Across The Years

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Selection of noteworthy athlete quotes regarding why they do, or do not, follow a specific nutrition strategy. This study aimed to characterize self-reported dietary periodization across macro general practices across the annual cycle , meso training and racing phases and micro between- and within-day phases of training and competition in a large cohort of elite female and male middle- and long-distance runners and race walkers.

Historically, nutrition guidelines for endurance athletes have focused on strategies to habitually achieve high CHO availability to support performance and recovery around training and races Coyle, Indeed, it seems that this cohort of elite road-distance athletes are aware of, and aim to, follow current sports nutrition guidelines that emphasize optimal CHO intake around key training and racing Thomas et al. On the contrary, and as expected, these strategies were less important for athletes competing in shorter distance events where endogenous CHO fuel stores are not limiting.

Meanwhile, more recent studies have focused on the adaptation and performance effects of strategically and periodically implemented low CHO availability before, during, or after exercise Bartlett et al.

These studies suggest that occasional and strategic training with low CHO availability increases the cell signaling and gene expression responses that are usually seen after endurance training, thereby leading to further enhanced endurance capacity and performance. Possible strategies, as detailed in a recent commentary of definitions and proposed outcomes Burke et al.

Optimize performance, accelerate recovery, prolong careers

While these strategies and their potential outcomes are intriguing, studies in elite athletes have failed to show direct performance benefits Burke et al. Furthermore, studies on bone and iron health suggest these strategies may impair bone and iron metabolism, possibly leading into increased bone breakdown Sale et al. Therefore, careful day-to-day periodization is likely required, where low CHO availability is primarily scheduled around low intensity sessions Hearris et al.

A more recent advancement in the field is periodization of body composition Stellingwerff, , which refers to the manipulation of body composition via a mixture of nutrition and training strategies for optimal health and performance. The underlying idea is that race weight should not be maintained year-round, as this is likely to require chronic periods of low energy availability EA and its related impairments of several health and performance related measures Mountjoy et al.

Therefore, EA may need to be periodized across the year, with emphasis on higher EA levels during heavy training and altitude camps, and lower EA during lower training volumes and closer to the competition season. In addition to this macro and meso periodization of EA, emerging evidence suggests that within-day EA micro level periodization has also significant health consequences Deutz et al. In the current study, middle-distance athletes reported more attention to the effects of nutrition strategies on physique outcomes; however, their chief focus was to build and maintain lean mass.

Females and males have an equal ability for CHO storage and utilization during exercise if energy availability is adequate Tarnopolsky et al. However, female distance athletes tend to eat less CHO than males Burke et al. Indeed, females are more likely to suffer from eating disorders Sundgot-Borgen and Torstveit, Namely, male athletes were more likely to follow a chronically high CHO diet Figure 1. Males were also more likely to follow a high energy diet in the acute time period preceding the race day Figure 9.

Contrary to previous guidelines Coyle, , more recent sports nutrition guidelines have incorporated the value of specialized strategies to optimize adaptations to training, noting that these protocols may often be contradictory for acute performance outcomes or other health goals, and need to be carefully integrated into the various phases of the annual plan Thomas et al. We were interested to identify whether these concepts were understood by elite athletes and used to inform their various nutrition strategies.

Meanwhile less was known about specific strategies to further stimulate cellular adaptations to exercise Figures 5 , 6.

EVIDENCE-BASED PERFORMANCE OPTIMIZATION

Indeed, many athletes lacked understanding of the periodization of strategies to train with low CHO availability, furthermore, others were either skeptical of their value, concerned about perceived or actual disadvantages particularly related to illness or injury, or practicing some aspects within their routines by accident. It is important to note that the current study describes self-reported nutrition practices that are implemented across the training and competition year.

We have previously shown that there is a discrepancy between general descriptions of practices reflecting a macrocycle and actual self-recorded intakes collected across a micro cycle in elite distance athletes Heikura et al. Indeed, it is possible that self-reports such as those found in the current study, reflect either what athletes aspire to achieve or perceive that they follow rather than actual behaviors. However, this potentially perceived versus actual mismatch would hypothetically be equivalent across the various sub-groups of athletes.

Furthermore, our survey questions were qualitative i. Nevertheless, our survey was based on the learnings from a pilot study Heikura et al. Our key findings suggest that: 1 Road athletes train with both low and high CHO availability within the annual training plan, while track athletes are less likely to incorporate a large spectrum of CHO availability in their training; 2 Middle-distance athletes emphasize physique when choosing a nutrition strategy; and 3 Performance appears to be the key driving factor influencing nutrition choices, while themes such as body composition manipulation, health, and practicality are less important.

Overall, our findings indicate that elite track and field distance athletes are aware of and report following the current sports nutrition guidelines in terms of high CHO availability around key training sessions and during racing. This is a survey study which participants completed via an online survey tool. Consent to participate was completed via ticking in a box.

The participants who proceeded to complete the survey were thus seen as consenting to participate in research. IH, TS, and LB designed the study, developed the survey, recruited the participants, and prepared the manuscript. IH collected, organized, and analyzed the data. All authors approved the final manuscript. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The authors would like to thank colleagues, coaches, and athletes for their assistance during the recruitment process.

A special thank you goes to all athletes who participated in the study. Anderson, L. Daily distribution of macronutrient intakes of professional soccer players from the english premier league. Sport Nutr. Energy intake and expenditure of professional soccer players of the english premier league: evidence of carbohydrate periodization. Areta, J. Skeletal muscle glycogen content at rest and during endurance exercise in humans: a meta-analysis. Sports Med. Badenhorst, C. Acute dietary carbohydrate manipulation and the subsequent inflammatory and hepcidin responses to exercise.

Bartlett, J. Carbohydrate availability and exercise training adaptation: too much of a good thing? Sport Sci. Bradley, W. Burke, L. Guidelines for daily carbohydrate intake: do athletes achieve them? Toward a common understanding of diet-exercise strategies to manipulate fuel availability for training and competition preparation in endurance sport. Low carbohydrate, high fat diet impairs exercise economy and negates the performance benefit from intensified training in elite race walkers. Eating patterns and meal frequency of elite australian athletes. Cox, G.

Daily training with high carbohydrate availability increases exogenous carbohydrate oxidation during endurance cycling. Coyle, E. Timing and method of increased carbohydrate intake to cope with heavy training, competition and recovery. Sports Sci. Deutz, R.

Performance Enhancing Diets and the PRISE Protocol to Optimize Athletic Performance

Relationship between energy deficits and body composition in elite female gymnasts and runners. Sports Exerc. Fahrenholtz, I. Within-day energy deficiency and reproductive function in female endurance athletes. Sports 28, — Gejl, K. No superior adaptations to carbohydrate periodization in elite endurance athletes. Hawley, J.

Training techniques to improve fatigue resistance and enhance endurance performance. Hearris, M. Regulation of muscle glycogen metabolism during exercise: implications for endurance performance and training adaptations. Fluid Balance, Hydration, and Athletic Performance presents a comprehensive review of aspects relating to body fluid balance, rehydration, sport, and physical exercise.


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The content is scientifically supported, practical, and suitably written for a range of audiences, including academics professors In order to achieve and maintain peak performance, high-level athletes require the right nutrition at the right time. Nutrition for Elite Athletes provides a comprehensive overview of the latest research on the nutritional requirements of athletes at the top of their game.

Since researchers, Optimizing Physical Performance During Fasting and Dietary Restriction examines the effects of sustained fasting and food restrictions on metabolism and physical performance in athletes. It provides broad coverage including both religious and non-religious fasting and dietary restrictions. This title includes a number of Open Access chapters. Childhood obesity is a major public health crisis nationally and internationally. This insightful compendium provides valuable information and assesses the research foundations behind several school initiatives to help combat the epidemic of Addresses the Aging Process and Its Effect on Sports Performance Age-related changes influence all physiological systems, including those used during exercise and sport.

Highlighting masters athletes—older adults who train and compete in organized sports—Nutrition and Performance in Masters The use of antioxidants in sports is controversial due to existing evidence that they both support and hinder athletic performance. Carnitine Metabolism and Human Nutrition offers a contemporary and in-depth look at the biological effects of carnitine metabolism and its application to clinical and sports nutrition, based on decades of robust scientific enquiry. It gathers and distills key results of the last 20 years of CRC Press exhibits every year at more than professional and academic conferences held across the world.

At these events, you will have the chance to meet the authors and to get to know the CRC Press staff. You can also take advantage of special discounts for convention attendees. Visit us at the following conventions throughout the year. Stay on CRCPress. Stay Connected:. There is lack of scientific evidence about protein intake, that ingestion of protein within the limit 1.

People who do not include adequate protein in daily diet may show slower recovery and training adjustments [ 24 ]. Protein supplements or ergogenic aids offer a convenient way to ensurethat athletes take quality protein in the diet and complete their protein needs. However, ingesting additional protein beyond the daily requirement does not help in additional gain in strength and muscle mass. The research focus over recent years has been to influence whether different types of protein e.

In addition, a significant amount of research has examined whether timing of protein intake and provision of specific amino acids may play a role in protein synthesis or training adaptations, conducted mostly in untrained populations [ 26 ]. Although more research is necessary in this area, evidence shows that protein requirement ofindividuals busy in intense training are elevated, various types ofprotein have different effects on anabolism and catabolism.

It wasobserved that different types of protein subtypes and peptides have unique physiological effects and timing of protein intake may play a significant role in optimizing protein synthesis following exercise. Therefore, it is simplistic and misleading to suggest that there are nodata supporting contentions that athletes need more protein in theirdiet and there is no possible ergogenic value of incorporating varioustypes of protein into the daily diet [ 27 ]. It is the position stand of ISSN that exercising individuals require approximately 1.

ISSN exercise & sport nutrition review: research & recommendations

According to the current literature we know that the addition of protein and BCAA Branch Chain Amino Acid before or after resistance training can increase protein synthesis and increase in lean mass beyond normal adjustment. However, it should be noted that gains have primarily been observed in untrained populations unless the supplement contained other nutrients like creatinine monohydrate [ 29 ].

Shriver et al. Muslim athletes who fast during Ramadan should use overnight pportunities to consume foods and drinks that can supply the nutrients require enhancing performance, adaptation and recovery in their sports or activity. Because of the benefits of being able to consume at least some of these according to the nutritional needs of athletes, their exercise and nutrition plan should be revised [ 31 ].

The use of weight loss diet, selection of foods and frequent weightfluctuation among athletes preparing for competition in weightclasses and leanness sports have shown various problem for years, but the extent of the problem and the health and performance results have yet to be fully examined [ 32 ]. A review article by Wescott concluded that standard resistance exercise is effective in reversing muscle loss, recharging resting metabolic rate and reducing fat, alleviate physical activity, improving blood glucose levels, better cardiovascular health, increasing bone mineral density, enhancing mental health and reversing specific aging factors [ 33 ].

Reduced lean weight is responsible for decreased resting metabolic rate, which is typically accompanied by increased fat accumulation. It was concluded that a high protein diet may enhance the effects of exercise for increasing subject lean weight and decreasing DBP rate. It was further indicated that a higher protein and lower calorie diet plan enhance the effects of exercise for reducing person body weight, BMI, percent fat, fat weight, WC, SBP rate and DBP rate, while accomplishing similar gains in lean body mass [ 34 ]. Assessment and promotion of exercise and physical activity which is beneficial in achieving desired benefits across several populations.

Most work suggests that exercise and physical activity are associated with good quality of life and health outcomes. Therefore, assessment and encouragement of exercise and physical activity may promote well-being in achieving desired benefits across several populations [ 34 ]. An ergogenic aid is any training techniques, mechanical devices, nutritional practice, pharmacological method or psychological techniques that can improve exercise performance capacity or enhance training adaptations.

It helps in individual to tolerate heavy training to a greater degree by helping them recover, faster or help them stay injury free and healthy during intense training. Some studies show that supplement significantly enhances exercise performance e. On other hand it prepares an athlete to perform or enhance recovery from exercise. It has the potential to improve training adjustment and therefore must be considered ergogenic [ 34 ]. The quickest method of increasing muscle creatine stores is by consuming 0. Creatine products are readily available as a dietary supplement and are regulated by the US Food and Drug Administration.

Bhasin et al. Testosterone also elevates male sex characteristics e. Low level anabolic steroids are often prescribed by doctorsto prevent loss of lean weight for people with various diseases andillnesses [ 38 ]. Research has generally shown that use of anabolic steroids and growth hormone during training can promote increase in strength and lean weight.

However, a number of potentially life threatening contrary effects of steroid abuse have been reported including liver and hormonal dysfunction, hyper lipidemia high cholesterol , increased risk to cardiovascular disease and behavioral changes i. For this cause, anabolic steroids have been banned by most sportorganizations and should be avoided unless prescribed by a physician to treat an illness [ 41 ].

Diet is of great importance to athletes, the key to achieving anoptimal sports diet in relationship to peak performance and good health is balance. Athletes must fuel their bodies with the appropriatenutritional foods to meet their energy requirements in competition, training and recovery.

If these nutritional needs are not met, there isan increased risk of poor performance and health issues. The use of anutritional supplement within established guidelines is safe, effectiveand ethical. Hundreds of studies have shown the effectiveness of creatine monohydrate supplementation in improving anaerobic capacity strength and lean body mass in conjunction with training, but still there is sports specific variation in the food fads and practices indicating the strong influence on coaches and peers.

It is vital to educate the sportsmen about the dietary pattern. Failure to consume right diet during competition due to false belief in markets and constant fear of eating prohibited foods may hamper performance. Finally the future of nutritional supplement looks bright in regard to the areas of transport mechanism, improved muscle retention as well as treatment of numerous clinical maladies through supplementations. Abstract Introduction Conclusion References. Abstract Participation in physical activity is essential for physical and mental health of children. Keywords: Physical activity; Nutrition counseling; Food and health.

Introduction Sports nutrition is a specialization within the field of nutrition that partners closely with the study of the human body and exercise science [ 2 ]. Why study sports nutrition? Why sports nutrition is important? What are the basic nutrients? Fuel for exercise When carbohydrate is delivered at desirable rates during or after endurance exercise, protein supplements appear to have no direct performance increasing effect. Impact of other factors responsible for food choicesduring an event Shriver et al. Ergogenic Aid An ergogenic aid is any training techniques, mechanical devices, nutritional practice, pharmacological method or psychological techniques that can improve exercise performance capacity or enhance training adaptations.

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Conclusion Diet is of great importance to athletes, the key to achieving anoptimal sports diet in relationship to peak performance and good health is balance. A Multidisciplinary Approach. Congeni J, Miller S Supplements and drugs used to enhance athletic performance. Pediatr Clin North Am Am J Health Promot Fogelholm M Physical activity, fitness and fatness: relations to mortality, morbidity and disease risk factors. A systematic review. Obes Rev Bonci L Sport nutrition for young athletes. Pediatr Ann 5.

Greany J How much physical activity should I do for good health. Pidemont heart institute. Jeukendrup A, Cronin L Nutrition and elite young athletes. Weber S The success of open source. Harvard University Press. Dietary guidelines for Americans. Srilakshmi B Food Science. In: Food Technology and further food eds.


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