I'm not to sure about hospital tests. I would assume that they are just like any other pre-employment test. Mine was at a clinic that's connected to the hospital and I didn't have to sign anything like that. As for the gym, I've heard that burning fat is a good way to boost the cleansing process. However, I was told by a friend not to work out a few days before the test. He said that because you would be releasing the THC from your fat cells quicker there will be more in your system. He recommended working out until about two or three days before the test to give them time to flush out.