Two thirds of the British public could be risking their health by not exercising enough, a report has said.
And many claim that their routine during work time keeps them too busy to stay fit, according to a study by the Chartered Society of Physiotherapy (CSP).
Despite half of those surveyed claiming they would lead a healthier life in order to lose weight, just one in five said they exercised once a month.
The report found that 40% of people find it difficult to walk up stairs without getting out of breath, with women appearing to be less fit than men.
Most of those polled said they would take more regular exercise if they could fit it into their daily routine, with work commitments being cited as the biggest reason for not exercising.
CSP spokeswoman Bridget Hurley said: "Most people know physical activity is good for their health but when it comes to doing it, exercise simply isn't a priority.
"Regular physical activity is as important as eating five portions of fruit and vegetables a day, and people need to understand that you can't keep putting it off. Without sufficient physical activity you increase your risk of life-threatening illnesses."