aye, i started doin cardio everyday about a week ago, been just walking on the treadmills at my gym, on their highest incline setting, i get my heartrate to about 150ish constant, and walk for about 40-50minutes, and i run every once in a while during my walks for a mile or so, havent ever really done alot of cardio before, so was just curious if this is good or not, any constructive comments are appreciated, thanks