You want something that improves her osteoporosis, which is usually weight-bearing exercise. So avoid the swimming one, because that's just decreased gravity. The best answer is walking outside every day that could strengthen her over time.
ezzoI overthought this and figured that the long walk would just make her fall and break her other hip UGH +112020-05-13T01:07:38Z
jsanmiguel415I only got it because I did the opposite - assumed that going to a wet pool could cause her to slip and fall +42020-06-04T18:34:42Z