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

1.) Walking is a difficult and sate exercise for beginners
2.) Walking is an easy and safe exercise for beginners
3.) Walking is a boring and dangerous form of exercise
4.) Walking is an exciting and very effective form of exercise