Font size
Worksheets24. Muscle Fibre Type Recruitment
Total questions: 16
Worksheet time: 10mins
Which type of muscle fibre is primarily recruited during low-intensity, long-duration activities such as walking or cycling for several miles?
Type IIa fibres
Type I fibres
Type IIx fibres
Fast glycolytic fibres
During a 100-metre sprint, which muscle fibre type is predominantly recruited?
Type I fibres
Slow oxidative fibres
Type IIa fibres
Type IIx fibres
What is the main characteristic of Type I muscle fibres?
High force production, fatigue quickly
Low force production, fatigue resistant
High force production, fatigue resistant
Low force production, fatigue quickly
Which muscle fibre type is best suited for activities requiring explosive power, such as jumping or lifting a 50 kg weight?
Type I fibres
Type IIa fibres
Type IIx fibres
Slow oxidative fibres
As exercise intensity increases, which order best describes the recruitment of muscle fibre types?
Type IIx → Type IIa → Type I
Type I → Type IIa → Type IIx
Type IIa → Type I → Type IIx
Type I → Type IIx → Type IIa
Which of the following activities would primarily recruit Type IIa muscle fibres?
Jogging at a steady pace for 3 miles
Sprinting 100 metres
Running a 400-metre race at near maximum effort
Walking up a gentle hill
How many muscle fibre types are there?
(a)
Which muscle fibre type is most resistant to fatigue?
Type IIx fibres
Type IIa fibres
Type I fibres
Fast glycolytic fibres
During a maximal effort lift of 100 kg, which muscle fibre type is most likely to be recruited?
Type I fibres
Type IIa fibres
Slow oxidative fibres
Type IIx fibres
Which of the following best describes the recruitment of muscle fibres as exercise intensity increases?
All fibre types are recruited equally at all intensities
Slow-twitch fibres are recruited first, followed by fast-twitch fibres as intensity increases
Fast-twitch fibres are recruited first, followed by slow-twitch fibres
Only fast-twitch fibres are recruited at any intensity
Which muscle fibre type has the highest mitochondrial density?
Type IIx fibres
Type IIa fibres
Type I fibres
Fast glycolytic fibres
What is the primary reason Type IIx fibres fatigue quickly?
High mitochondrial content
Low glycogen stores
Low oxidative capacity
High capillary density
Which activity would most likely recruit all three muscle fibre types?
Sitting quietly
Walking 100 metres
Lifting a 2-pound weight
Running a 1500-metre race at maximum effort
Which muscle fibre type is also known as fast oxidative-glycolytic?
Type I fibres
Type IIa fibres
Type IIx fibres
Slow oxidative fibres
What is the main determinant for the order of muscle fibre recruitment during exercise?
The size of the muscle
The intensity of the exercise
The temperature of the environment
The colour of the muscle
Match the sporting action with the muscle fibre type
100m
Type IIx
High jump
Type IIx
400m
Type IIa
1500m
Type 1
Up and down the basketball court
Type IIa
