Those people who kicked off their dieting regime at the start of the year are likely to fall off the wagon today, which has been dubbed as 'Death Of The Diet Day'.
The survey led by insurer PruHealth showed that two-thirds of Britons had planned to begin a diet or a get-fit regime in January.
Of those, 30 per cent have already abandoned their regime and more than a quarter caved in after less than a month.
Psychology and health professor Cary Cooper at Lancaster University believes that during recession, people tend to look after themselves better.
"Anyone with a stressed spouse would tell them to cut back on the cigarettes and drinking and to start eating healthier and do more exercise," the Daily Express quoted him as saying.
"They want them to be able to cope with the added strain," he added.
But many lose motivation to stick to the regime.
The survey revealed that Brits were the weakest willed with 14 per cent quitting their diet within seven days.
One in 10 of the Welsh quit after just a week with just nine per cent of Scots and the Northern Irish abandoning their regimes
However, majority of people stuck to their diets for 45 days more than they did last year. Most dieters soldiered on for an average 123 days - around four months.
Forty five percent managed to make it far. Of those 55 per cent planned to keep up their new healthy lifestyle forever.