I am an able-bodied person, and I don't always shower every day. At the risk of giving Too Much Infromation here, I rinse pits at the bathroom sink at least once a day. I heat a teakettle to just comfortable temp and use it for netherparts whilst sitting on the toilet. I do this because the shower I have access to leaks and damages the structure underneath and I can't afford to repair it. I also sometimes dip a washcloth in warm water to wipe over back of shoulders etc. It is no failure to not shower as often as you used to. In a lot of other parts of the world water is very scarce and people get by with a lot less washing.

If you feel unsafe showering, you can use a shower chair and also if it's an option have someone you trust come over to just sit and wait in the living room until you are safely done.

Sometimes too you have to choose where to put the limited energy you have.