lecture 1- exercise and nutrition summary

Question 1

Main ingredients of sports drinks

Answer 1

water, sugar (CHO), electrolytes (slats), colourings, flavourings, acidity regulators

Question 2

Meat components

Answer 2

75% water
25% protein

Question 3

elite athlete energy demand example:

Answer 3

100m sprint- main means of energy: ATP-PCr (substrate level phosphorylation) - from a nutrition point little can be done immediately prior to or during the activity
800m - main means of energy: anaerobic metabolism. main substrate used = glucose (glycolysis) - some aerobic respiration (from CHOs) - all nutrition needs to happen before the event.
Marathon = main means on energy = aerobic metabolism - the ability to aerobically use fuels to provide energy. Vast majority from glycogen and CHOs, but more will also come from fat. We can intervene as nutritionist during the event.

Question 4

Metabolism

Answer 4

Anything that involves ATP use or generation
Activity/ muscular work fuelled by ATP
final end products of metabolism are water and CO2

Question 5

Anabolism

Answer 5

precursors turned into end products

Question 6

Catabolism

Answer 6

Deals with the regeneration of ATP from ADP and Pi (CHOs, lipids ad AAs are the main fuels used to resynthesise ATP (alcohol can be used to resynthesise ATP))