People who are using exercise for general health benefits or as an obesity treatment have been advised to set "realistic goals".
Rich Leigh, weight loss expert and founder of Fatfreefitness.co.uk, has said that when people realise that weight loss is a life change they often become disheartened.
To combat this and keep motivation up after the New Year rush, Mr Leigh recommended that people "set more realistic goals, either by saying exactly how much they want to lose and sticking quite regularly to that plan, or by finding some other motivation … [such as] finding a gym buddy".
He added that weight loss is hardest when you "end up forcing yourself to do something that you don't want to do" and so he advised people to take up a sport they enjoy and will want to carry on with indefinitely.
To stay healthy, the UK government recommends that adults take half an hour of moderate exercise at least five times a week.
Independent advice on private healthcare