Master launched the door of personal practice. First of all, you should like it, or you will eat it for nothing if you don't insist.
Winter and summer are the longest working seasons. Be careful not to strain the ligament.
Does not affect Sanda. There is a heavyweight.
I'm sorry I don't have this knowledge, because I haven't seen any muscular female students in our school before.
Finally, I personally suggest that you don't learn Sanda. Sanda is hard, bloody, cruel and boring, which is not suitable for you. You have almost learned Taekwondo. You said you'd better learn routine performance if you are in poor health, but you are a little old. I think yoga is actually quite good.