Check Your “Fitness Age” With This Research-Based Calculator 

Jill Tucker, RN says: “Are you younger or older than your fitness age? A simple online calculator can provide the information. A younger fitness age is ‘the single best predictor of current and future health’—based on research that carefully noted the exertions of 5000 Norwegians.” Check Your "Fitness Age" With This Research-Based Calculator Popular Science  November 1, 2013