Physical Fitness

Which of the following is a benefit of exercise on the muscles?

• Decreased muscle mass

• Reduced strength and endurance

• Increased blood circulation

• Diminished blood flow during exercise

Which of the following increases physical fitness?

• a decrease in mitochondria in the muscles

• an increase in capillaries surrounding muscles

• a decreased stroke volume

• a limited capacity to store glycogen

Eating which nutrient will maximize glycogen storage in muscles:

• lipids

• protein

• carbohydrates

• water

Tags

NGSS.HS-LS1-7

After several weeks of physical training, you would expect a person's resting heart rate to:

• increase

• decrease

• stay the same

Tags

NGSS.HS-LS1-3

A person who exercises regularly will have ____________ mitochondria in each of their muscle fibers than someone who does not.

• more

• less

• the same amount of

Tags

NGSS.HS-LS1-7

True or False: Someone must work out for at least 60 minutes a day to experience physiological changes.

• true

• false

Answer explanation

Only 20-30 minutes of moderate exercise three times a week can help your circulatory and respiratory systems work more effectively.

What is glycogen?

• A hormone that regulates blood sugar levels

• A protein that helps build muscles

• A carbohydrate that stores energy

• A neurotransmitter that causes muscles to contract