Every evening when i sit down, after about 10 - 15 minutes its like my joints and muscles seize up, my whole body aches, it feels similar to if someone has punched you and the area goes lika a kinda dead feeling, it really hurts. i struggle to get up sometimes and actually walk etc, but after moving around for 10 mins it eases. then i sit down for 10 mins its back. im a 34 year old female.