Predicting your risk of a – from type 2 diabetes to depression and even your longevity – is as simple as testing .

Grip strength refers to the by the muscles of the hand and forearm to perform actions such as grabbing, squeezing an object or even shaking hands. This action involves a complex interplay between the various muscle groups located in the forearm, as well as the muscles within the hand itself.

Grip strength is a very cheap, easy and non-invasive measure of muscle strength. This test has been used since the mid-1950s as a measure of overall health. Since then, the simple test has been firmly established as a reliable marker of various aspects of health – with some researchers even suggesting grip strength can be used to of everything from type 2 diabetes to depression.

The standard method for measuring grip strength involves using a handheld dynanometer – an instrument which can measure a person’s power. This test is usually done while a person is sitting down. With their forearm bent at a 90-degree angle and wrist held in a neutral position, the person then squeezes the dynamometer as hard as they can – usually three...