Posted July 19th, 2017, 07:13 PM
Hey Mike the idea behind it is if you stay on one pace at a set incline you can get bored or complacent.. If your trying to lose weight it s better to alter your incline and sppeds every few minutes, most newer treadmills will have a setting like this. I go to PF...(judgement free zone).. Before you do anything too stressful just be careful and don't overdo it.. Rob..