High-Intemsity (anaerobic) Exercise 2

Question 1

What causes muscle soreness?

Answer 1

Damaged connective tissue & cross bridges

• release of Ca2+ through sarcolemma
• increased protease activity
• increased cell damage
• inflammation
• soreness and fatigue

Question 2

Explain lactate shuttle

Answer 2

Lactate removal favoured in slow fibres

Lactate formation favoured in fast fibres

Question 3

What is the muscle pH at rest and after high intensity exercise?

Answer 3

~ 7.0 at rest.

Can fall below 6.3 after HI exercise

Question 4

What are the limitations to repeated sprint exercise?

Answer 4

Anaerobic metabolism
- Enzyme activity (CK, PFK)
Substrate availability 
- PC, CHO
By-product accumulation (buffering of and tolerance to)
- lactate, H+, Pi
Recovery
- O2 availability

Question 5

What to consider when causing anaerobic adaptations?

Answer 5

Need high intensities (SAID principle)
Consider rest period
Importance of quality e.g 4 x (6 x(5s sprint: 55s recovery) 2min rest)
Must be metabolically stressful