i am wondering if–when i am not partaking in any sport or much physical activity–yoga will be right for me. i am a very fit teenager and have great balance already. to keep my body the way it is, fit and strong, will yoga work?

i am looking for a good, basic yoga workout or other similar physical activity in which to start off. i suffer from fibromyalgia and want to regain some strength and help alleviate my muscle tension and pain. thanks!