The treadmill workout that will kick your ass

The other day, after I finished my workout, I still had about 20 minutes until I needed to leave the gym and i wanted to save 10 minutes for stretching, so I decided to hit up the treadmill. I didn't want to do a boring 10 minute run or even a run/walk so I decided to change it up a bit and did a 10 minute ass-kicking interval workout.

Since I only had 10 minutes, I wanted to do something that packed a big punch and that really got my heart rate up and, most importantly, something that kept my mind from wandering off in to lala land.

Minute 1 - Walking Lunges
Speed: 0.5-1.5 mph

Minute 2 & 3 - Side Shuffles (one minute with each leg forward)
Speed: 2-3 mph

Minute 4 - Fast paced walk @ incline
Speed: 3-4 mph
Incline: 9-12

Minute 5 - Sprint
Speed 6-7 mph

Minute 6 - Walking lunges
Speed 0.5-1.5 mph

Minute 7 - Side Shuffle (30 seconds with each leg forward)
Speed: 2-3 mph

Minute 8 - Fast paced walk at an incline
Speed: 3-4 mph

Minutes 9 & 10 - Run at a moderate pace
Speed 5-6 mph

Cool down after with a 3-5 minute walk.

When I say that this workout will kick your ass, I mean this workout will kick your ass. Literally, my butt cheeks were so sore the next morning. I don't plan on replacing any workout with this treadmill routine, but I will definitely be doing it at the end of shorter workouts just to pack an extra punch and get a little more sweaty.

What kind of cardio do you add in to your routine workouts?