Non or low impact.: "bad back and knees" is pretty nonspecific, but you should focus on achieving & maintaining appropriate weight for your height and general fitness. Your knees absorb 40% of your weight on impact, so favor them with low or no impact exercises like swimming, cycling, walking, and low impact aerobics. For your back, work the "core" muscles in your back and abs. A "bridge" is a classic sore exercise.
Answered 1/23/2015
6.3k views
Swimming: Is good if you can find a pool.
Answered 4/6/2013
5.2k views
A doctor has provided 1 answer
A doctor has provided 1 answer
10 doctors weighed in across 2 answers
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question