Overweight people taking physical therapy have a special need when using a step stool. The step stool has to be rated at 500 pounds for bariatric needs. There are many step stools that are being used as bariatric step stools such as wooden steps, but if you inspect the step stool closely you will NOT find any kind of load rating on them. It doesn’t make sense to go to the trouble of going to your physical therapy class to improve your health only to get injured from an inferior step stool that couldn’t hold your weight when exercising.