re: OT Runners: Advice needed

He might still be too heavy to incorporate sprints. He's going to be bent over gasping for breath when he should be walking in between. He needs to interval his pace for sure to gain stamina but going from a slow jog to a sprint for a fat guy isn't the best idea.

He'd be better off doing quarters and increasing and decreasing the pace for each quarter mile. One at his 10 minute pace and the next at a 9 minute pace and then working his pace up gradually.