Research suggests men with low levels of the hormone are five times more likely to die early and could also have a greater risk of developing type 2 diabetes, dementia and depression.
In the first study to look specifically at age, exercise and brain health in retirement, researchers from University College London wanted to see whether timing of active lifestyles had an impact.
An eye-opening Harvard University study last week revealed eight surprising factors that raise the risk of suffering an early death. Now, the authors behind the paper have developed a first-of-its-kind calculator.