I think you've already gotten the answers you need, but the only real physical requirements are I think a 200M swim, 400M swim with mask, snorkel, fins, and then a 15-20 minute safety swim (tread water or float). I just did rescue in late June/early July but under NASE and NAUI rather than PADI. I can't see the requirements being too much different between the agencies, other than NASE requiring a tired diver tow using a buddy line. My instructor did require us to remove an unconscious diver from the water onto a dock, which meant pushing/pulling the victim up 4-5 steps out of the water, but he also went up first to help lift them. The most fun part for me (and I'm pretty sure this wasn't a rescue course requirement) was recovering an unconscious diver from depth (in this case about 25') as a skin diver, which meant the diver has full gear and the rescuer has mask snorkel, fins. And in our case a wetsuit, which added to my already positive buoyancy.
It's a great class! So far my favorite one. You'll learn a lot. Not only about rescue but also about what to look for and how to prevent incidents/accidents before they occur. And you'll learn a lot about yourself as a diver, too. It'll teach you how to recognize problems and stressors in yourself before and during dives and how to manage them and how to self-rescue in an emergency situation. It's a great confidence booster!