Targeting metabolism for ergogenic benefit Flashcards
What are the advantages of HIIT training?
- Increases capacity for anaerobic energy production
- Enhanced tolerance of metabolic acidosis due to increased muscle buffer capacity and improved ionic regulation (K+ balance).
What are the potential benefits to following a high fat diet?
Used as a strategy to decrease reliance on carbohydrate and improve endurance performance.
Why does a high-fat diet impair high-intensity exercise performance?
As a result of an inability to fully activate glycogenolysis and PDH during intense exercise.
What are the effects of high caffeine dosage 60 mins before exercise?
-Enhances lipolysis and fat oxidation during exercise
-Decreases muscle glycogen use and increased endurance performance (sometimes)
What is carnitines main role(s)?
Plays a major role in moving fatty acids across mitochondrial membrane and regulating amount of acetyl-coA in mitochondria.
Are carnitine levels high or low during HIE?
Low - this may contribute to downregulation of fat oxidation
In order to be effective, what is the best way to ingest carnitine?
Alongside large amount of carbs (to generate high insulin levels). This can increase muscle carnitine uptake.
What does nitrate do?
Decreases oxygen cost of exercise
What does high intensity training do to muscle buffer capacity?
Increases it. A major determinant of muscle buffer capacity is carnosine content,
What does ingestion of b-alanine do?
Increases muscle carnitine content and enhances high-intensity exercise performance.
How can exercise training counteract the negative effects of ROS?
By increasing the antioxidant levels.
What are negative effects of hyperthermia?
Decreased skeletal muscle blood flow and increased muscle glycogen utilization during exercise in heat.
What are 3 strategies to reduce negative effects of hyperthermia?
Acclimation
Pre-exercise cooling
Fluid ingestion
