COURSE CATALOG

SSE 232: Exogenous Ketone Supplements as Ergogenic Aids in Athletic Performance: A New Dawn Fades?

The ketone bodies acetoacetate and β-hydroxybutyrate have wide-ranging metabolic and molecular effects on organs such as the brain, heart and skeletal muscle, some of which are suggestive of benefits to athletes in terms of performance and recovery. The recent development and increasing commercial availability of ingestible forms of ketone bodies as exogenous ketone supplements has amplified interest in these compounds. A variety of compounds classified as exogenous ketone supplements are now available and have been subject to several studies in exercise performance and recovery contexts in human participants. While there are mechanistic bases for potential beneficial effects of exogenous ketone supplements in various athletic contexts, most studies to date have failed to observe benefits to performance or recovery.

SSE 231: Dietary carbohydrate and the endurance athlete: contemporary perspectives

The importance of carbohydrate as a fuel source for endurance exercise and athletic performance is well established. Despite decades of intense carbohydrate research within the field of sports nutrition, new knowledge continues to be generated with the potential to inform practice. To ensure sufficient muscle glycogen availability, endurance competition or high-quality intense training should be preceded by daily dietary carbohydrate intakes scaled to the demands of the subsequent exercise. The optimization of liver and muscle glycogen content in the hours before and hours directly after exercise are important goals for carbohydrate nutrition. In this respect, nutrition strategies that combine glucose and fructose carbohydrate sources appear most beneficial for enhancement of performance and recovery. Athletes looking to benefit from carbohydrate feeding during exercise can choose from a wide range of readily oxidizable carbohydrate sources, with glucose-fructose blends (inc. sucrose) affording the greatest flexibility for within-event modulation of carbohydrate intake. Finally, a periodized approach to dietary carbohydrate intake around training will ensure athletes have sufficient fuel to execute the demands of training to maximize training adaptation whilst minimizing the potential for adverse health or performance consequences (e.g., through development of RED-S). 

SSE 228: Functional Ingredients to Support Active Women

There are important sex-based differences that exist between men and women that may influence nutrition and dietary supplement recommendations. The hormonal fluctuations throughout the menstrual cycle, and with oral contraceptives, result in metabolic alterations which should be considered when making supplement considerations for active women. Body composition and protein metabolism also change throughout a woman’s lifespan. This course will detail the scientific evidence related to sex-specific nutritional recommendations.

SSE 227: Sports Nutrition Recommendations for Elite Female Soccer Players

The application of sound nutritional guidance is necessary to support female soccer player health and performance. Based on findings in elite female soccer players, there is scope to improve nutritional practices relative to energy intake, fueling, hydration, and supplement use. Drs. Samantha Moss and Rebecca Randell discuss the energy and nutrient needs of female soccer players and areas where additional high-quality research that includes elite female players as participants is necessary.

SSE 226: Sweat Biomarkers for Sports Science Applications

There has been considerable interest recently in the concept of sweat biomarkers, which is generally defined as the use of sweat as a non-invasive alternative to blood analysis to provide insights into human physiology, health, and performance. Despite recent technological advances in wearable devices the application of sweat diagnostics in sports science has been limited to date. This course will discuss the challenges of utilizing sweat biomarkers and wearable technologies as well as where future work is needed.

SSE 225: Beyond Caffeine for Mental Performance

In this course, Dr David Kennedy discusses caffeine from a research and real-world perspective. Caffeine, when taken alone in a research context, is associated with consistent ergogenic and psychological benefits, although within differing optimal dose ranges. In a real-world sport/exercise context, caffeine is often consumed alongside other bioactive compounds in the form of manufactured energy drinks or naturally occurring, plant-derived, caffeinated products. This SSE course explores the state of the research and where further exploration is needed.

SSE 224: Application of Sports Nutrition to Healthy Aging

Aging is associated with the progressive loss of skeletal muscle mass and decline in physical function which may result in reduced mobility and subsequent loss of independence. Exercise is a potent stimulator of muscle protein synthesis in both athletic populations and in older adults. Dietary practices by athletes to augment performance and recovery may be relevant to the preservation of skeletal muscle mass and strength in older adults such as the supplementation with creatine, long chain n-3 polyunsaturated fatty acids (n-3 PUFAs), and inorganic nitrate.

SSE 221: Fish Oil for Healthy Aging - Potential Applications for Master Athletes

Long chain n-3 polyunsaturated fatty acids (LC n-3 PUFAs) are a class of biologically active fatty acids that play fundamental roles in the production of anti-inflammatory signalling molecules as well as serving as vital components of phospholipid membranes. The most well studied LC n-3 PUFAs are eicosapentaenoic acid (EPA; 20:5 n-3) and docosahexaenoic acid (DHA; 22:6 n-3). Often associated with improved cardiovascular health, there is now emerging evidence that ingestion of LC n-3 PUFAs above population recommendations enhances skeletal muscle anabolism in older adults. Indeed, daily intake of ~ 5g/d of LC n-3 PUFAs has been shown to potentiate the muscle protein synthetic response to the infusion of insulin and amino acids and increase gains in skeletal muscle strength with resistance exercise training in older women. These findings suggest that LC n-3 PUFA intake could have ergogenic effects in older exercising adults. However, more recent work has failed to detect a positive impact of LC n-3 PUFA intake towards skeletal muscle in older persons. Yet, few studies have been conducted in highly-trained older adults, or ‘master athletes’ thus it is unclear if there is a benefit to increased LC n-3 PUFA  intake in this specific population. Aside from the potential ergogenic benefit, as some older adults possess sub-optimal LC n-3 PUFA status, there may be utility in increasing LC n-3 PUFAs ingestion in older persons to support healthy aging. 

SSE 220: Plant versus animal-based proteins to support muscle conditioning

Because of the discussions on more sustainable food production and the need to improve lifestyle and health, there is a growing interest in the transition towards consuming a more plant-based diet. As a result, daily protein intake will be derived more from the consumption of plant-based proteins at the expense of animal-based proteins. There are many questions on whether this has impact on the capacity of an athlete to recover and recondition following exercise. So far, basic research indicates that the ingestion of plant-derived proteins may not stimulate muscle protein synthesis to the same extent when compared to the ingestion of an equivalent amount of animal-derived proteins. The proposed lesser anabolic properties of plant- versus animal-based proteins have been attributed to differences in protein digestion and amino acid absorption kinetics. Furthermore, most plant-derived proteins have lower essential amino acid contents and can be deficient in one or more specific amino acids. However, it should be noted that very few studies have directly compared muscle protein synthesis rates following the ingestion of plant- versus high quality animal-derived proteins. Theoretically, a lower bioavailability and/or functionality of plant-based protein sources and/or plant-derived protein concentrates may result in greater daily protein requirements for athletes transitioning towards a (more) plant-based diet. However, as athletes typically consume a diet that provides more than 1.5 g protein per day, a lesser protein bioavailability or protein quality will unlikely compromise muscle conditioning in athletes adopting a (more) plant-based diet. However, when athletes are changing to a plant-based diet under conditions of low(er) energy and/or protein intake, a sports dietitian should be consulted to ensure ample protein provision.

SSE 219: Protein requirements of master athletes: do they need more than their younger contemporaries?

Dietary protein is essential for an athlete’s recovery and adaptation as it provides the requisite amino acid building blocks to repair and remodeling old and/or damaged proteins, especially within working skeletal muscle. Amino acids may also be used as a source of fuel during exercise that requires high mitochondrial flux (e.g. repeated sprint and steady state endurance exercise) and therefore must be consumed in the diet to replenish these exercise-induced losses of the essential amino acids (e.g. branched chain amino acids). The majority of research on protein requirements for athletes have been performed in young individuals, which opens debate as to whether Master athletes would require similar or greater intakes. Available evidence suggest current recommendations for younger athletes would also translate to Master athletes. As opposed to daily protein targets that have been the focus of past research, current practice suggests the most efficient strategy to consume the daily protein requirement is to focus on consuming meals with a moderate amount of protein spaced regularly throughout the day. There is little evidence to suggest that protein requirements in older Master athletes are different between men and women, although estrogen is generally ‘protein-sparing’ and therefore can reduce protein requirements by ~10-15%. There appears to be an opportunity to educate Master athletes as to their meal protein requirements, which may be a safe and effective way to improve their training recovery and adaptation. 

SSE 216: Youth Athlete Development and Nutrition

Adolescence is a period of natural experimentation and is particularly important in terms of establishing the connection between diet, exercise and body image. An adolescent’s peers become increasingly powerful moderators of all behaviors, including eating. The pathway to elite sports performance is complex, and rarely forecast by success at junior levels. Stakeholders involved in managing developing athletes have a responsibility to prioritize sound physical and mental development while integrating principles of sport nutrition success. 

SSE 215: Practical Approaches to Nutrition for Female Athletes

The majority of published sport nutrition recommendations are based on studies conducted with male athletes. In female athletes, the menstrual cycle may affect optimal nutrition strategies for performance, but menstrual cycles can be quite variable. Authors Bryan Holtzman and Kate Ackerman review the nutritional recommendations for female athletes from a variety of perspectives. Within the review, the energetic requirements for athletes and the negative effects of failing to meet these requirements are discussed. The authors also establish a model for meeting nutritional needs of increasing complexity and personalization for female athletes and provide baseline recommendations for female athletes. This course aims to provide practical advice for athletes, coaches, physicians, and other members of the athlete entourage.

SSE #213: Cannabidiol (CBD) and the athlete: claims, evidence, prevalence and safety concerns

Cannabidiol (CBD) is a non-psychotropic cannabinoid found in the cannabis plant and is no longer prohibited by the World Anti-Doping Agency; however, all other cannabinoids remain on the prohibited list. The legal status of CBD is complicated and varies from country to country. Athletes and coaches must be aware of the country (and state) specific legal status of CBD. Dr. Graeme Close and colleagues discuss the benefits of CBD that have been reported both anecdotally and within the literature as well as the risks with CBD use on health, safety and potential for inadvertent doping via the presence of tetrahydrocannabinol (THC) or other cannabinoids in CBD supplements. 

SSE #211: Omega-3 fatty acids for training adaptation and exercise recovery: a muscle centric perspective in athletes

Omega-3 polyunsaturated fatty acids are traditionally associated with cardiometabolic health with implications for reducing risk of cardiovascular disease. More recently, omega-3 fatty acids have received considerable attention in the context of athlete health and performance, specifically with regards to promoting training adaptation and exercise recovery.

SSE #210: Hydration and team sport cognitive function, technical skill and physical performance

Team sport athletes are at risk of training and competing in a hypohydrated state when fluid losses are large and/or there are challenges with fluid availability or opportunity to drink. Technical skill and cognitive function are essential to team sport athlete performance and may be impaired with hypohydration, especially when combined with heat stress. The mechanism of cognitive impairment with hypohydration is not fully understood. Decrements in cognitive function, skill and physical performance in team sports are more likely to occur when hypohydration levels are > 2% body mass loss, but there is significant inter-individual variability in the effect of hypohydration on team sport performance. 

SSE #208: An update on beta-alanine supplementation for athletes

Fatigue during high intensity sports or activities (~1-10 minutes in length) is caused by several components with strong evidence that muscle acidosis via accumulating hydrogen ions is a key performance inhibitor.  To address this issue, skeletal muscle has intra and extracellular buffering mechanisms to attenuate exercise induced acidosis.  Carnosine is an intracellular buffer that is key in slowing the decline of muscle pH.  Carnosine has a nitrogen containing imidazole side ring which accepts or buffers hydrogen.  This buffering can contribute as much as 15% of total buffering capacity.  Additionally, carnosine has been shown to be a calcium/hydrogen exchanger, delivering calcium back to the sarcoplasmic reticulum and hydrogen away to the cell membrane.  This suggests that carnosine may increase calcium sensitivity and muscle contraction efficiency.  Plasma beta-alanine is the rate limiting substrate of carnosine.  Approximately 3-6 g/d of beta-alanine supplementation over at least four weeks can elevate muscle carnosine stores by 30-60%.  Several meta-analyses have been conducted and has shown 2-3% increased performance in non-elite athletes, followed with just 0.5-1% increased performance in elite athletes. 

SSE #207: Dehydration and Exercise-Induced Muscle Damage: Implications for Recovery

Dehydration (>2% reduction in body mass) can result in decreased performance and delayed recovery.  Although it has not been largely studied, there is limited evidence that suggests that dehydration may exacerbate exercise induced muscle damage (EIMD) and prolong recovery.  The proposed mechanisms for the adverse effects of dehydration on EIMD include alterations in cell volume and ion flux, cell membrane disruption, impaired excitation-contraction coupling, decreased skeletal blood flow, modified red blood cell properties, and/or intensification of maladaptive signaling.   

SSE #206: Nutritional factors that affect fat oxidation rates during exercise

During exercise, both fat and carbohydrate are metabolized to produce energy.  At lower intensities and rest, fat is the predominate substrate that is metabolized.  As intensity increases, carbohydrate metabolism increases and fat metabolism decreases.  Incremental exercise tests have been developed on both a cycle ergometer and treadmill to measure the maximal fat oxidation (MFO) and at what intensity MFO occurs (FATMAX).  It has been shown that there is large individual variation in MFO and FATMAX, and that individuals may have a unique FATMAX curve.  Increasing an athlete’s fat oxidation may be beneficial as it could preserve the limited amount of muscle and liver glycogen, which could then delay fatigue.  Several nutritional supplements thought to increase fat oxidation have been studied, such as; green tea, New Zealand blackcurrants, caffeine, and Omega-3.  In addition to supplementation, training strategies to decrease muscle and liver glycogen availability prior to exercise have been shown to increase fat oxidation during exercise.  It is important to note that an increase in fat oxidation during exercise has not been associated with improved performance.

SSE #204: Blood biomarker analysis for the high-performance athlete

SSE #203: Caffeine and Exercise Performance: an update

Caffeine is one of the most studied supplements and has shown ergogenic effects in almost every sport scenario it has been studied.  The benefits of ingesting moderate to high doses of caffeine (5-9 mg/kg of body mass) before and during exercise have been well established in endurance exercise.  Although the moderate to high doses of caffeine improves endurance performance, side effects such as gastrointestinal upset, nervousness, mental confusion, inability to focus and disturbed sleep have been reported.  Lower doses of caffeine (<3 mg/kg of body mass) have been shown to have similar performance benefits as the moderate to high doses, and without the side effects.  In addition to endurance performance, caffeine also improves performance in stop-and-go and team sports that require short-term, high intensity movements.  Caffeine seems to have an antagonistic interaction with adenosine receptors in the central and peripheral nervous system, which increases central drive and reduces the perception of fatigue and pain during exercise.  There is some variation between individuals in response to the effects of caffeine and it is unclear whether genetic polymorphisms can explain the inter-individual seen during caffeine administration. 

SSE #201: Nutrition and Athlete Bone Health

Bone health is an important aspect that the general population should pay attention to, especially the athlete population.  Good bone health will not only prevent immediate injuries such as stress fractures but will prevent long lasting damage later in an athlete’s life such as osteoporosis.  Even though athletes need to pay special attention to their bone health, the general recommendations to support bone health is not very different from the general population and it is not clear whether the recommendations for the general population will adequately support an athlete’s needs through periods of intense training.  Athletes should consider consuming additional supplements if their food preferences or intolerances do not allow them to get sufficient nutrients needed to support their bone health.  Athletes also need to be aware of their energy intake and expenditure to ensure they are maintaining a positive energy balance. 

SSE #199: Nutrition Recommendations for Altitude Training

High altitude training camps are commonly used by endurance athletes in order to increase their fitness prior to competition.   Energy availability (EA) requirements may be altered by low to moderate altitudes, and it is suggested that EA may play a role in an athlete’s ability to adjusts to hypoxic conditions.  Iron is a micronutrient with known importance to an athlete’s health while at altitude and is important for increasing hemoglobin mass.  While studies investigating physiological adaptations at extreme altitudes (>3,000 m.) have been conducted, there is a call for more studies at low to moderate altitudes (1,600-2,400 m.).  Since the effects of training at low to moderate altitudes are not yet fully confirmed, it is best to apply sea-level nutrition and hydration guidelines to an athlete’s training at altitude.