Thanks for your reply. Biking does not seem to hurt me . I cannot ride an individual bike any longer due to very poor balance. My husband and I have been riding a tandem bike for over 25 years. That still works for me and is a source of pleasure in warm weather. Yoga is a mixed bag. I think that sometimes I try to hard and actually hurt myself. Knowing my limits seems to be hard for me. Swimming (I used to coach it) used to be my best exercise, but the university pool closed for good and the high school pool is just too cold for someone with fibromyalgia. Walking is great when it is safe Lasy winter I fell 6 times, once resulting in a hip and back injury and another time a concussion. If I walk with my husband it is usually safe. Thanks for referring me to some information. I appreciate it.