Hey all I'm currently doing this 2-3 times a week on the treadmill. 3 mins warm up at 5mph 5 x (1 min at 12mph, 1 min at 4 mph) 5 x (1 min at 11mph, 1 min at 3 mph) 2 mins cool down at 2.5 mph If it's relevant, I'm 27, weigh 135lbs My...