PHYSIOLOGY
DIFFERENT TYPE AND STRUCTURE OF MUSCLE FIBERS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
20%
|
|
|
40%
|
|
|
60%
|
|
|
80%
|
Detailed explanation-1: -Type I, or slow-twitch fibers, are seen in high abundance in elite endurance athletes, such as long-distance runners and cyclists. Alternatively, fast-twitch IIa and IIx fibers are abundant in elite power athletes, such as weightlifters and sprinters.
Detailed explanation-2: -Since world-class sprinters typically have 65-85 percent fast-twitch muscle fibers – and vice versa for world-class distance runners and slow-twitch fibers – it’s unclear how much they were able to create that biological advantage and how much they were simply born with it.
Detailed explanation-3: -Muscle biopsies (samples taken from the muscle) show that sprinters tend to have more fast twitch fibres, whereas marathon runners would have more slow twitch fibres. The rest of us have a more equal distribution of each.