I'm curious about all this great exercise everyone's doing. Do you experience any tingling/numbness or any other sensations but you just keep on going? I work at an extremely large manufacturing plant and can walk up to 1.25 miles just to attend a meeting! I usually get some tingling in the front of my thighs after a while and my doc says it's fine as long as it goes away after some period of rest. All this exercise is awesome!