A new calculator can reveal your body's true age, the effect your lifestyle is having and how many years it might be shaving off your life.The test takes into account factors such as weight, the amount and intensity of exercise undertaken, cholesterol, eating habits, levels of happiness and alcohol consumption.And it can reveal a very different picture to a chronological age. A 30 year old, for example, can have the health age of a 50 year old, or older, dependent on their lifestyle choices.For example, a 30-year-old woman who is 5'4" tall, weighs a healthy 9st (57kg), exercises at a medium-high intensity four times a week, eats a good diet and drinks seven units of alcohol a week, has a body age of 30.Take out the exercise and this jumps to 32. Add 10 cigarettes a day and 20 units of alcohol a week (around two bottles of wine) and this rises again to 35. A 50-year-old man who is 5'9" (175cm), weighs 13 stone (83kg), does low intensity exercise such as walking for five hours a week, has a moderate diet, drinks two pints of lager a night (roughly 28 units of alcohol a week) and is relatively happy, has a body age of 56.Add in high blood pressure and high cholesterol and this rises to 63.The 'Vitality Age Calculator', as it is called, also reveals the measures that could reduce your reduced body age.Sports stars, for example, are testament to the fact that a healthy lifestyle can knock years off the ageing process. Former athlete Lord Sebastian Coe, 57, has a vitality age of 54, while 27-year-old Olympic gold medallist Jessica Ennis scored just 23 when she took the test.Developed by PruHealth, it is based on an algorithm derived from an analysis of over 5,000 studies relating to death, and was developed in conjunction with leading academics.     It was created as part of the Britain’s Healthiest Company survey – which looked at employee health of nearly 10,000 people.The results painted a worrying picture. One in five UK workers were found to have a Vitality Age more than eight years older than their actual age - and one in seven UK workers lost seven years off their life by not exercising.Despite being double their age, many 60-year-olds had a lower health risk - the difference between someone’s real age and their ‘Vitality Health age - than people in their 30s.Those in their 60s who were surveyed had a ‘health age’ on around three years older than their chronological age - effectively meaning they had lost about three years off their life. But the average person in their 30s had lost four years.The study found that the biggest factors which pushed up body age were a lack of physical activity and being overweight.  And to make matters worse, two thirds of Britons are in denial, believing they are in good or excellent health, despite showing two or more risk factors that could increase their chances of getting a life-shortening disease.  Because of this denial, they aren't making lifestyle choices that could reduce their risk of heart attack, stroke or diabetes, such as quitting smoking, eating a better diet or taking up exercise.The study found that 69 per cent of smokers refused to give up and 64 per cent of people were unwilling to change their eating habits. Nearly one in five were overweight and the same amount had high blood pressure. Dr Katie Tryon, PruHealth head of clinical Vitality, said: 'We all lead busy lifestyles trying to squeeze in as much as possible and thinking about your health can sometimes take a back seat.'Often when you’re feeling up against it, it’s tempting to compensate by having a glass of wine or cigarette, or take a few shortcuts by grabbing an unhealthy snack or skipping the gym, but it’s these lifestyle choices that ultimately impact on our health.  'People are living longer, but not longer, healthier lives, so this will show people the real state of their health and help them decide if they need to introduce some better habits.  'By taking small steps today can dramatically improve wellbeing over the long-term, regardless of your current state of health, and truly understanding the implications of your choices is the first step.'(dailymail.co.uk)ANN.Az