Weightlifting vs sprinting Flashcards
How do weightlifters’ muscles adapt to their training?
Exist in an anabolic state; HGH stimulates collagen fibres rather than contractile tissue; more type II
Is there a mechanism for storing excess proteins?
No
How much protein and amino acid would be recommended for a weightlifter?
40g protein, 6g amino acid
How is protein turnover affected by a training session?
Both breakdown and synthesis are increased
What is the typical muscle fibre in sprinters?
Type II
What does it mean if fibres are highly fatiguable?
Inability to maintain force or power output; decrease in rate of ATP production; increase in ADP accumulation due to PCr depletion and increased H+; fall in rate of glycolysis
How long does ATP store provide energy for sprinting?
~2s
How long does PCr store provide energy for sprinting?
30-100m sprints; above 50m power and speed may fall
How much more PCr do the muscles store than ATP?
PCr is 3-4 times more concentrated
Where is PCr found in the cell?
In the sarcoplasm
How is PCr synthesised?
At the liver from amino acids; creatine is obtained from the diet
What duration of sprinting does glycolysis provide energy for?
20s-2mins
At what point does the contribution of energy from glycolysis double that of PCr?
After 30s
When does ATP production from glycolysis reach is maximum rate?
After 5s
In what situations does muscle atrophy occur?
During bed rest; some diseases; when bones are broken and in cast; space flights; age
