Question

which system benefits most from aerobic exercise like running or swimming?
a. digestive system
b. nervous system
c. skeletal system
d. cardiovascular system
which type of exercise is ideal for improving flexibility and reducing muscle tension?
a. stretching
b. high-impact sports
c. stationary cycling
d. weightlifting

Explanation:

First Question:

Aerobic exercises like running or swimming primarily improve heart and lung function. The cardiovascular system (heart, blood vessels, blood) is directly enhanced by aerobic exercise as it increases heart rate, improves blood circulation, and strengthens the heart muscle. The digestive system is not the main beneficiary, the nervous system's primary benefit from aerobic exercise is indirect (like stress reduction), and the skeletal system benefits more from weight - bearing or resistance exercises. So the cardiovascular system benefits most.

Stretching exercises are specifically designed to increase the range of motion of joints, improve flexibility, and reduce muscle tension by lengthening muscle fibers. High - impact sports are more for cardiovascular fitness and bone strength. Stationary cycling is an aerobic exercise for cardiovascular and leg muscle endurance. Weightlifting is for building muscle strength and mass. So stretching is ideal for improving flexibility and reducing muscle tension.

Answer:

d. Cardiovascular system

Second Question: