The gym is a great place to shed pounds and lessen the stress of your day, but it is also a place where thieves land in order to fulfil their goal to rip you off. A past tip on auto burglary prevention reminded you not to leave valuables in your car and items in plain sight, but you must also be alert when inside the gym.
Use a good quality lock and choose a locker in the open that is visible to the room if you choose to bring items inside. Always double check that the lock is secure. If possible, leave what you can at home. Try using a lanyard to hang a minimal set of keys and your ID around your neck, forgoing the use of a locker. Use clothing with zippered pockets as an alternative to lessen the chance of items falling out. Bottom line, minimize your exposure to the chance of loss and becoming a victim. Be alert and pay attention.