Marathon runners should Tend to have more slow-twitch muscle fibers.
Why do marathon runners have slow twitch muscle fibers?
- Slow-twitch fibers contract more slowly and less forcefully than Type II fibers. Distance runners love them because they're teeming with mitochondria, myoglobin and capillaries -- ingredients that ensure the steady supply of oxygen and energy we need to run aerobically.
- Muscles with more slow-twitch fibers have more blood vessels. This is because they need a good and constant supply of blood and oxygen to let them work for a long time without getting tired. Fast-twitch muscle fibers don't need as much blood because they make their own quick source of energy.
Marathon runners should Tend to have more slow-twitch muscle fibers.
To learn more about Marathon runners refer:https://brainly.com/question/19301459
#SPJ2
