GUARD AGAINST INJURY. As important as it is to be physically active, it's also important to stay safe while being active. The first step in keeping fitness safe is wearing proper equipment. When playing on the street, biking, running, or in-line skating in the evening or on overcast days, reflective gear should be worn. Protective gear, which may include helmets, elbow and wrist guards, and gloves depending on the activity, are all necessary for biking in-line skating, and for extreme sports, such as snowboarding.