London has the healthiest workers while Wales fares the worst, according to a new UK health map based on data on a combination of lifestyle choices and clinical outcomes of 10,000 employees across the country.

With the rising costs associated with healthcare, an aging workforce more likely to require treatment for chronic illness, and the simple fact that people in good physical condition tend to be injured less severely than those who are out of shape,  organizations are increasingly able to argue that what you do on your own time is indeed their business.

In a surprising finding, new research out of Great Britain shows that many employers in their 60s have a lower “relative vitality age” – and thus, lower health risks – than colleagues in their 30s. The Britain’s Healthiest Company Report* crunched numbers on nearly 10,000 people and concluded that the sexagenarians in the survey had lower health risks based on a “Vitality Age calculator” developed by PruHealth, a health insurer and wellness program provider.