Carbohydrate and Fats Part 1 W2 Flashcards
What are the 4 carbohydrate function?
Energy
Central Nervous system
Physical activity
Fibre: Health benefits
How does exercise cause increased carbohydrate oxidation?
Increases liver glucose output
Increases muscle glycogen breakdown
At high relative workloads, what is a decisive factor for maximal work time?
Glycogen stores in exercising muscle
In what manner do exercise increase glucose output?
In an intensity dependent manner
How is fatigue strongly correlated with carbohydrate depletion?
Increased muscle glycogen depletion
When hypoglycaemia is present, it reflects liver glycogen depletion
How can carbohydrate feeding affect these processes?
It increases muscle glycogen
Intake during exercise maintains blood glucose
What intensity is CHO utilisation obligatory?
Higher relative intensities
When does liver glucose tend to increase?
When exercise intensity increases (only increases to the extent of the liver glucose stores)
What happens to liver glucose output during increased exercise?
It can increase almost 3x increase in liver glucose as it tries to match muscle blood glucose intake
What happens to blood glucose during liver glucose output?
It stays relatively the same but can creep out
Why may blood glucose slightly increase during liver glucose output?
Action of adrenaline to exercise is a real powerful stimulator for glucose output and may overshoot to compensate
What does feeding of carbohydrate depend on to determine whether its maintaining or increasing?
Exercise intensity
Muscle glucose demands
When does the fastest rate of muscle glycogen depletion occur?
When the starting levels are at its highest
Why does a sugary drink not slow muscle glycogen usage during exercise?
Does not slow it down due to CHO oxidation total rates are higher than the human body can digest and absorb- not enough to offset the demand of muscle glycogen use
(May slow down liver glycogen)
What is rate limiting?
Muscle glycogen
