Muscle fibres

Question 1

Name the three muscle fibre types

Answer 1

• Slow oxidative/ type 1
• Fast oxidative glycolytic/ type 2a
• Fast gylcolytic/ type 2b

Question 2

Describe type one muscle fibres

Answer 2

Contain mitochondria and myoglobin so they work aerobically which produces little force but resists fatigue

Question 3

Describe type 2a muscle fibres

Answer 3

Produce large amounts of force and can only resist fatigue for a short length of time

Question 4

Describe type 2b muscle fibres

Answer 4

Designed to work anaerobically and they contain phosphocreatine, produce large amounts of force but fatigue quickly

Question 5

SO fibres are recruited (1) to provide a (2) force of contraction. Aerobic training should be carefully considered work to relief ratios should be (3) as this won’t damage fibres so can be done (4)

Answer 5

1 - intermittently
2 - low
3 - 1:1 or 1:0.5
4 - daily

Question 6

Fast oxidative fibres are recruited (1) near muscular exhaustion which often results in (2) work to relief ratios should be (3) recovery time can be between (4) and muscle groups should not be exercised (5)

Answer 6

1 - in the last 2-20 seconds of a contraction
2 - fibre damage (DOMS)
3 - 1:3+
4 - 4-10 days 
5 - more than once in 48 hours