Why do people who participate in marathons tend to have smaller muscles?
a. lifting weights provides no benefits for them.
b. muscle endurance is more important for them than muscle strength.
c. continuous running burns glucose and fat.
d. they participate in a sport more suited to their body type.

People who participates in marathon generally have smaller muscles as the muscle endurance is important for them than the muscle strength.

Further Explanation:

Marathon is the type of long distance foot race.

The marathon race occurs on the road. The runner who participates are trained for the race.

Human muscles are of three types. They are:

1. Smooth muscle: They are under voluntary control. Present in the urinary bladder, the stomach, the intestine.

2. Cardiac muscle: They are under involuntary control. Present in the heart.

3. Skeletal muscle: They are under involuntary control.

People that are involved in marathon race generally possess smaller muscle as the muscle endurance is more important for them than the muscle strength.

The physical action performed by the person requires the functioning of various muscle. The smooth muscle plays the key role in the contraction. These muscles are also attached to the two bones through the tendons in the joint, therefore they also participates in the movement of parts of these bones nearer to each other.

The muscle movement occurs by shortening the length and moving the bones nearer to each other.

Learn more:

1. Learn more about core muscle

2. Learn more about voluntary control of muscle

3. Learn more about bone

Answer Details:

Grade: College  Biology

Subject: Health

Chapter: The muscle movements

Keywords:

Marathon, voluntary, urinary bladder, cardiac muscles, skeletal muscle, involuntary, muscle, contraction, tendons, joint, bones.

i think the answer is strength