as Cheshire Figment mentioned, the rides that have the most movement and G forces do have warnings on them. There is a little icon (sort of a red triangle) warning which rides are likely to cause a problem. Those are also the rides that have belts, bars or something else to leep you in place.
I agree with getting an OK from your doctor before going on anything except the most tame rides.
You might also want to look into renting a wheelchair or
ecv to help conserve your energy. You can rent them at the parks, first come, first served. Or, if you think you will need one more than occasionally, you can rent one from an off site rental place. Here is info on how to contact them:
CARE Medical Equipment - 1-800-741-2282
www.caremedicalequipment.com
RANDY'S Mobility in Kissimmee 407-892-4777
http://www.randysmobility.com/
Walker Medical - 1-800-334-9501
www.walkermobility.com
Colonial Medical
http://www.colonialmed.com/about_cms.html
The off site places will deliver and pick up
ecvs and wheelchairs from your resort. You can even call and get one after you have checked in if you decide you would be better off with one. If you are staying on site, the buses do have lifts or ramps and tiedowns to carry wheelchairs or ecvs.