Free when you recruit three or more friends to join the Nike+ Human Race.

Treadmill training can be monotonous, but not with this 30-minute mix-it-up workout designed by Jay Blahnik. This audio workout was engineered to help you train on the treadmill for the Nike Human Race 10K. It will build your endurance and improve your speed on various inclines; the perfect workout to get you primed for race day.

Download it HERE after recruiting your friends to run the Nike+ Human Race.