Overdoing it at work is bound to make you tired, grumpy and stressed. But research suggests it could also significantly increase your risk of developing type 2 diabetes - even if you’re not overweight. A major study has found that those under the most strain at work are 45 per cent more likely to fall ill with the condition, which increases the risk of heart disease, strokes, blindness and amputations. Some three million people in the UK are currently affected by the disease, but if trends continue this could rise to four million by 2025 and five million by 2030, with type 2 accounting for 90 per cent of cases. The study, from the Institute of Epidemiology in Munich, followed 5,337 men and women aged between 29 and 66 who were in full-time work.

Over a 12-year period, nearly 300 of the subjects - who were previously healthy - developed type 2 diabetes. As well as measuring body mass index (BMI) and family medical history, researchers quizzed volunteers on their stress levels at work. High job strain was defined as being faced with huge demands but having little control over how things are done.  When the researchers matched patients with the work stress results, they found those who were under most pressure were 45 per cent more likely to have developed diabetes. The findings - published by journal Psychosomatic Medicine - showed that even among workers with relatively healthy BMIs, stress at work was still a significant risk factor.