Why most people fall off a ‘health cliff’ at 75 — and 5 ways to avoid the drop

Longevity expert Dr. Peter Attia reveals why most people decline sharply in their 70s, and shares his athlete-inspired ...
BBC

Positive and negative numbers

What are positive and negative numbers? Any number above zero is a positive number. Positive numbers are written with no sign or a '\({+}\)' sign in front of them and they are counted up from zero to ...
BMJ

Physical inactivity: the biggest public health problem of the 21st century

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be ...