[Dragonnak]

Everytime I'm playing my guitar my leg looses circulation and I get that tingling sensation. Anyone know why this is always happening ?
I'm using a new strap with suctions instead of the foot stool but even with the foot stool my leg was alway falling asleep.
I don't seem to notice that I'm putting any typical weight on the guitar that would cause my leg to lose circulation like that.
Oh I also using a normal computer chair which is quite soft.