The 8 Minute Workout MP4 video

Eight minutes of high-intensity interval training is all the exercise most mortals need. 

The says, "even a few minutes of training at an intensity approaching your maximum capacity produces molecular changes within muscles comparable to those of several hours of running or bike riding." 

This workout guides you through the following 12 exercises for 30 seconds at a time, with 10-second breaks in between:

Jumping jacks

Wall sit

Pushups

Abdominal crunch

Step-up onto chair

Squat

Triceps dip on chair

Plank

High knees running in place

Lunge

Pushup and rotation

Side plank

Caution: Consult your physician before starting any exercise regimen. 

Caution: You will have no more excuses not to workout every day.

Caution: This is not your traditional workout video, as most of what you see are silly workout #fails. Try not to laugh while exercising intensely.

Caution: You will likely break a sweat and feel things in places where you didn't know you had places. If 8 minutes isn't enough, feel free to play it again and again--and congratulations on being in good shape!