I will tell you that Yoga has been a game changer for me. I am more flexible now than in my 20's (late 40's now) and consider it an integral part of my health, as important as cardio and weight training. I can touch my toes jumping out of bed in the morning and never stretch before biking. I cannot remember the last time I pulled a muscle. I recommend attending a beginner class, you can get a Groupon for a few classes for maybe $25. Amazon also has an excellent series of videos.