Muscle contraction during exercise of differing intensities and during recovery

Question 1

Describe 3 functional characteristics of Type 1 SO Fibres

Answer 1

-Most resistant to fatigue
-Lowest speed of contraction
-Low strength of contraction
-High aerobic capacity

Question 2

Describe 3 functional characteristics of Type 2a FOG Fibres

Answer 2

-Low resistance to fatigue (but more than type 2b)
-High speed of contraction
-High strength of contraction
-High anaerobic capacity

Question 3

Describe 3 functional characteristics of Type 2b FG Fibres

Answer 3

-Lowest resistance to fatigue
-Highest speed of contraction
-Highest strength of contraction
-Highest anaerobic capacity

Question 4

Describe the order of recruitment of muscle fibres during exercise of increasing intensity

Answer 4

-We use the least amount of muscle fibres needed to get the
job done, starting with…
-Type 1 SO – as these are most resistant to fatigue
-Then if more force is required we next recruit Type 2a FOG
fibres as they have high strength of contraction
-If maximum force is required we next recruit Type 2b FG
fibres as these contract with highest strength of contraction.