When it comes to losing weight, it appears that money talks.

A new study has found that people taking part in a weight loss programme were more likely to complete it if they received financial incentives.

According to US scientists, previous studies have found that people tend to lose weight if there are financial incentives involved. However, this study looked at a larger group - 100 people - over a longer period - 12 months. The others studies only lasted between 12 and 36 weeks.

All the participants were aged between 18 and 63 and were classed as obese. They were divided into four groups - two with financial incentives and two without.

All were given a goal of losing 4lbs per month until they reach a pre-determined goal weight. They were weighed once a month.

The people in the incentive groups were given $20 per month if they reached their goal. If they did not reach their goal, they had to pay $20 into a bonus pool. All participants in the two incentive groups who completed the weight loss programme were then eligible to win the money in that pool.

The scientists found big differences in the completion rates. Just 26% of people in the non-incentive groups completed the weight loss programme, losing an average of just over 2lbs.

However, 62% of the incentive group completed their weight loss programmes, losing an average of over 9lbs.

Furthermore, even those who had to pay penalties were more likely to complete their weight loss programme compared to those who received no financial incentives.

"The take-home message is that sustained weight loss can be achieved by financial incentives. These incentives can improve results, and improve compliance and adherence," commented the study's lead author, Dr Steven Driver, of the Mayo Clinic.

The scientists pointed out that when it comes to weight loss, ‘traditional therapies are not working for a lot of people'.

"People are looking for creative ways to help people lose weight and keep it off. The results of this study show the potential of financial incentives,' they added.

Details of these findings were presented at the American College of Cardiology's 62nd Annual Scientific Session.