Furthermore, 11 per cent say the main source of their stress is work, with bosses and colleagues being to blame and it was also found that on average, people work seven hours of unpaid overtime every week
Mark Jones, head of protection at Friends Provident, said: "These are tense times and working longer often for little or no financial reward will add to people's stress levels."
He added that poor diet and lack of exercise were likely to exacerbate the problem, which could lead to long-term health issues.
Today (November 5th) is National Stress Awareness Day, which is supported by the Health and Safety Executive.
Companies and employees are being encouraged to work together to reduce levels of work-related stress, which cost 13.8 million working days in 2006/07.
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