In general, which factor is not critical when beginning an exercise program?

B. finding friends who like to exercise the same way you do. Although that is a good thing, because that increases the chances to continue exercising after some months, it is not a requisite, because you can exercise alone or you can make new friends at the exercise place chosen by you. On the other hand, it is very important that you use appropriate protective equipment, seeing a doctor for a physical assessment prior to beginning exercise, and choosing clothing that matches your program.