I walk, and use my exercise bike, I have found the Walk away the pounds DVDs useful, the movements are gentle and you can choose how long you want to walk. Rule of thumb for me, if I cannot do 10 mins a time I do five, if I cannot do 5 I do 3 etc. the key is moving, some days I have to do 2 mins. at the top of every hour and rest between. Take Care.

Stretching, warm pool, and walking. (although I like to take long walks when I do- it's killer after and the next day)

Stretches can help, but be careful not to over do it. I found this out the hard way, by my muscles aching more than usual the next couple days. Hope this helps. Gentle hugs.

I love my Ai Chi which is Tai Chi done in water in this case in my gyms warm water pool.

Yoga, recumbent exercise bike, body weight exercises. Start small and gradually start to do more.