mocat, here is the tonya harding workout:
3 minutes of walking @ 3.0 mph on a 12-15% incline to warm up, 5 minutes of ~8-10 min/mile (target heart rate about 165-170), 3 minutes @ 3.0 mph incline, 5 minutes running again... stop whenever you get tired.
if youre trying to lose a little chub, you need a caloric deficit. walking at an incline does 2 things: 1- mentally, youre walking. you can do another 5 minute run. you just had 3 minutes of walking. whats 5 minutes? 2- it burns a good number of calories.
its not like the miracle workout but for a treadmill and 20-30 minutes you burn a lot of calories.
do the HIIT when you can do 5 cycles of that and feel like you can run more.