
 Originally Posted by 
Charlie67
					
				 
				Because I am a lazy man by nature, I'm less about the mileage and more about effort. I maybe run only a mile, but I sprint a block, walk a block, repeat, repeat, repeat. takes me about 25 mins, 3 x week. When I sprint, its an all out sprint. I try to keep my heart rate around 130-140 or higher