Regular exercise reduces the appetite for fatty foods, new research suggests.

The British trial found that high levels of activity acted as a "buffer" - fending off cravings for unhealthy fare.

Scientists said the findings suggest that those who got a "high" from exercise were less likely to feel tempted by junk food.

The study, led by the University of Leeds, tracked 180 individuals in the lab.

First their cardio respiratory fitness levels, body composition and metabolic rates were measured, with participants classed as having high, moderate or low activity levels.

This was followed by two intensive days in the lab, where their appetite, tastes and and fullness levels were tracked throughout a day's eating.

Overall, the fittest group found fatty foods between 10 to 15 per cent less desirable than the couch potatoes, the study found.