A new calculator that is capable of working out your fitness age has been created by researchers.

The scientists confessed that the device is not any exact science but is a "rough estimate of cardiorespiratory fitness", News.com.au reported.
For the study, lead researcher Ulrik Wisloff and his team got 5,000 people between 20 - 90 years old to run on a treadmill to the exhaustion point.
Source-ANI