Muscular: Fibre types

Question 1

Type 1
(slow twitched)

Answer 1

-Contracts slowly
-Contracts with less force
-Most resistant to fatigue
-Rich blood supply
-Contains many mitochondria
-High capacity for aerobic respiration

Eg Marathon & triathalon

Question 2

Type 2a
(fast twitch)

Answer 2

-Are able to produce great force when contracting
-They’re resistant to fatigue but fatigue faster than type 1
-Use oxygen
-Suited to speed, power activities

Eg 100m, gymnastics floor routine, weight training

Question 3

Type 2x
(fast twitch)

Answer 3

-Fast glycolytic fibres
-They contract rapidly
-They fatigue the quickest
-Suited to anaerobic activities
-Depend upon anaerobic respiration
-Suited for high intensity activities

Eg Shot put, javelin