Your workout environment is the cornerstone of ensuring that you are exercising safely. Ensure that it is well aired (to maintain a fresh air supply), well lighted (to prevent falls), and not too hot (to prevent you from becoming overheated or dehydrated), and that it is not highly humid. If the damp air in the area needs to be dried out, installing a dehumidifier (which costs about $30 for a model that can handle a small room) could be of assistance.
A secure place to exercise should also have a floor that is level and enough of space for people to walk around. "Your workout space should be wide enough that you can move your arms freely, without touching anything when you're standing, and long enough to accommodate your whole body when you're on the ground for floor exercises," says Janice McGrail, a physical therapist at Spaulding Rehabilitation Hospital, which is affiliated with Harvard School of Medicine.
The floor should be kept clear of clutter and throw rugs, and any neighboring furniture that has sharp corners should be removed with care.