E3) Lactate system in exercise & sports performance

Question 1

Key facts

Answer 1

Anaerobic- no oxygen
High intensity exercise- over a long period of time (60-90 seconds)
Carbohydrates- converted into glucose
Unused glucose- stored in liver & muscles as glycogen
ATP is made using the lactate system- breaking down glucose & glycogen: anaerobic glycolysis

Question 2

Anaerobic glycolysis

Answer 2

ATP-PC system fades at around 10 secs, the anaerobic glycolysis begins
Liver and muscle glycogen stores are broken down by this system
Breakdown of glycogen releases energy- can be used to resynthesised ATP

Question 3

Breakdown of glucose & glycogen

Answer 3

Glucose → 2 ATP molecules
Glycogen → 3 ATP molecules

Question 4

Lactic acid production

Answer 4

Product of anaerobic glycolysis
Accumulates into the tissue & blood
Build up- cause fatigue in muscles & impedes contraction (burning feeling in muscles & pain)
Approx. 8 mins to aid LA removal from the muscles & storage of glycogen in the muscles