SPORTS NUTRITION

Question 1

what is the relationship between blood glucose levels and performance levels

Answer 1

the greater your blood glucose levels the greater your duration of performance

Question 2

what are the fuels available during training

Answer 2

1. FFA
2. liver and muscle glycogen
3. exogenous glycogen

Question 3

what limits the oxidation of exogenous glucose

Answer 3

gastric emptying
-this is the rate at which gastric fluids are passed to the intestine

Question 4

how does exercise influence gastric emptying

Answer 4

high intensity exercise has shown to delay gastric emptying

Question 5

how does more glucose consumption influence gastric emptying

Answer 5

the more glucose you consume; the slower your gastric emptying becomes

Question 6

what is the difference between CHO ingestion and CHO infusion

Answer 6

-infusion via the blood stream means it reaches your blood much quicker and so it is going to be oxidised much quicker during exercise than ingested CHO

Question 7

what is the affect of glucose ingestion on glucose appearance

Answer 7

RA= glucose appearance is the rate at which glucose appears in the blood
-so if we look at Ra over time- Ra is only going to increase after about an hour of exercise because the first hour is used to digest an absorb the glucose before it can enter the blood stream

Question 8

relationship between pre exercise muscle glycogen and exercise performance

Answer 8

the more muscle glycogen you have present before exercise; the greater your endurance is going to be ie; carbo loading

Question 9

effect of CHO loading on performance vs non loaded group

Answer 9

• both groups run a race at the same pace and for the first hour will use their glycogen stores at the same rate
  -but then after the first hour we see a decline in the rate of glycogen usage in the non loaded group ie; they need to preserve their smaller stores to try complete the same distance
  -this means they will have to slow their pace
  -the loaded group will have a greater rate of glycogen usage because they have more of it and so will be able to run at a greater pace and thus; will finish the race first
  -if the non loaded group dont slow their pace then they will fatigue and wont be able to finish the distance

Question 10

does CHO loading influence the rate at which blood glucose is oxsidised

Answer 10

no

Question 11

is there an affect of CHO loading on muscle glycogen usage

Answer 11

no