What does the term "breathing rate" mean?
a. the number of breaths taken during a specific period of time.
b. the amount of air that is inhaled into the lungs with each breath.
c. the amount of oxygen traveling in the body during exercise.
d. the change in breathing that occurs as a result of exercise.

Walking is not the most exciting form of exercise a person can take on for fitness. yet it is low impact and requires no fancy equipment. that makes walking a simple activity for those new to exercise. walking is less likely than other exercises to cause injury to leg tendons and muscles. all it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. of course, a person could increase the benefit of a workout by adding weights or speed walking. identify the main idea of this paragraph. walking is a difficult and safe exercise for beginners. walking is an easy and safe exercise for beginners. walking is a boring and dangerous form of exercise. walking is an exciting and very effective form of exercise.