Sprint 8 is a 20-minute, high-intensity interval workout program scientifically proven to boost energy, reduce body fat and promote lean muscle. Programmed directly into select Matrix cardio products, the speed and elevation automatically change during the workout as it moves through sprints and recovery internals. Learn more about the science: bit.ly/1TGsFXU | Matrix Fitness

Want to maximize your fat loss and physiological response from your workouts in the shortest amount of time? Don't we all. Sprint 8 is a form of High-Intensity Interval Training that can improve hormone levels, telomere length, and aid in fat loss. Ensuring that even if you are truly crunched for time, you can get the most out of your workout in under 30 minutes. Want to read up on Sprint 8? Follow the link in the comments below. | Onnit