I have discovered the joy of volunteering to help with research studies at the university. I don't do any of the ones that require taking new medications, but I have been in several that deal with muscle fatigue, lung capacity, and metabolic rate.
Not only do I help research, but I also get free bone scans, blood work, and other tests i would not normally receive. I have great lung capacity, my bones are extremely hard, and my blood work comes back normal. I'm told I'm too healthy for most studies which makes me feel even better!