Q: 當我們同一個姿勢做太久就常常會覺得手很麻或腳很麻,請問"我的
     手和我的腳好麻喔
"的英文應該要怎麼說呢?

A: Well, you can just say like either of these two:
I feel numb with my limbs after sitting such long time.
I have been sitting too long. I cannot move my legs and body
    freely. Give me couple of minutes then I shall be all right.