• Do not leave equipment lying around the weight room where someone could trip over it. Always use the collars that prevent weights from falling off the barbells. Be sure to keep your hands away from the chains, cams, pulleys, and weight plates of exercise machines when they are in use. Also, when selecting the weight for a machine exercise, be sure to push the pin in all the way. Be sure to wear a weightlifting belt on exercises that place stress on your lower back, such as bent-over lifts like squats, or barbell rows.