I notice lately since I've started doing more weight workout, my limbs may feel a little tingling, especially after a hard set of lifting reps. But after I get up and walk around for a little bit, the blood gets recirculated and the tingling goes away. Is this normal? Do other people experience this, too? Lately, if I sit on a chair too long and get up, the right side of the body feels numb for a couple of seconds. Or when I walk up the stairs somewhere (which I don't do much since I live in a 1 story home), the leg goes numb a little. Then after the stairs everything is normal again. Walking down the stairs is no problem. I'm not overweight or very muscular or anything like that. But I am lifting weight and I wonder if it would cause muscle development in certain areas that may constrict blood flow to my limbs sometimes.