New year's fitness resolutions 'forgotten in three months'
Nearly half of people who vowed to get fit at the beginning of 2007 gave up within three months.
New research is out as many start making new year's resolutions.
More than 60% of men and women plan on trying to get into shape in January.
Carl McCartney, head of group exercise at Virgin Active, advises people to stick with it.
"If you last out for the first 12 weeks of your programme you're more likely to continue on, so for most people to give up within three months is exactly right," he said.
"Most people will start the programme out, and then two or three weeks down the line the five times a week that they started out with will move to three then two, and then, if they're lucky, once a week."
