His strategy is unusual among cancer researchers, who have tended to focus on identifying cancer-causing genes rather than writing differential equations to describe the rate of tumor spread.

FORBES: Ideas & Opinions

The widely available equations for calculating heart rate training zones may not be specific enough to help you significantly improve performance, but they do provide a starting point, and when combined with a heart rate monitor, they can help you more accurately assess and monitor the intensity of your training sessions.

CNN: Is it possible to 'top out' on cardio strength?