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Endurance Nutrition: How do you fuel for success?

Session 1 from the 2021 ACSM/GSSI Go the Distance Summer Symposium features Matt Pahnke PhD of GSSI and U.S. Long-Distance runner Molly Huddle. Dr. Pahnke presents the science and recommendations for fueling endurance athletes and then discusses how to utilize those recommendations in practice with Molly. Each athlete is unique and personalizing sports nutrition recommendations is key to helping an endurance athlete build a successful training and race day nutrition plan.  

Course Objectives

Idenfity the key sports nutrition recomendations for endurance athletes

Discuss and apply the scientific recommendations for enduracne sports nutrition in a practical setting

Course

Credits

Course Expiration

ACSM

.75

07/14/2024

CSCCa

0.75

07/14/2024

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. 

Reference Article

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

Course Objectives

  • Utilize the information provided in this SSE to determine whether beta-alanine supplementation is right for your athlete and their training needs. 
  • Describe the mechanisms that carnosine buffers hydrogen and exchanges calcium/hydrogen. 
  • Discuss future applied research for beta-alanine and how else beta-alanine can be applied to non-elite and elite athletes.  

Course

Credits

Course Expiration

ACSM

1

06/24/2024

BOC

1

06/23/2024

Commission on Dietetic Registration

1

06/23/2024

CSCCa

1

06/23/2024

Reference Article

https://www.gssiweb.org/docs/default-source/sse-docs/stellingwerff_sse_208_a03.pdf?sfvrsn=2

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.

Reference Article

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

Course Objectives

  •  Utilize the information presented in this SSE and discuss the different supplements that may increase fat oxidation.
  • Describe Maximal Fat Oxidation and FATMAX and how ingesting carbohydrate may affect the fat oxidation curve.
  • Discuss the various strategies to decrease muscle and liver glycogen availability and how it may lead to an increase in fat oxidation.

Course

Credits

Course Expiration

ACSM

1

10/20/2023

BOC

1

10/20/2023

Commission on Dietetic Registration

1

10/20/2023

CSCCa

1

10/20/2023

Reference Article

https://www.gssiweb.org/docs/default-source/sse-docs/randell-spriet_sse_206_a03.pdf?sfvrsn=2

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. 

Reference Article

SSE #199: Nutrition Recommendations for Altitude Training

Course Objectives

  • Utilize the monitoring and nutritional recommendations from this SSE during an athlete’s high-altitude training. 
  • Discuss the initial hypoxic effects an athlete may experience and how to best prevent or alleviate the negative symptoms. 
  • Define energy availability and describe how an athlete’s energy needs may change while training at altitude.  

 

Course

Credits

Course Expiration

ACSM

1

10/07/2023

BOC

1

10/07/2023

Commission on Dietetic Registration

1

10/07/2023

CSCCa

1

10/07/2023

Reference Article

https://www.gssiweb.org/docs/default-source/sse-docs/sse_altitudenutritionarticle_v3.pdf?sfvrsn=2