A study conducted by the University of Exeter and published in the British Medical Journal (BMJ) has claimed that regular exercise offers 'no benefit' in the treatment of depression.

The NHS-funded study saw 361 patients being given help to boost their activity levels, in addition to receiving therapy or anti-depressants.

All patients had fewer signs of depression after a year, but there was no difference between the exercising and non-exercising groups.

The results call into question current NICE guidelines drawn up in 2004, which suggest that depression sufferers should do up to three exercise sessions a week.

The study, however, is in contradiction with a number of other studies on the subject of exercise and mental health.

A study conducted earlier this year on a larger sample - 60,000 people - by the University of South Carolina found that the prevalence of symptoms of mental depression decreased as levels of leisure-time physical activity increased.

Elsewhere, a research team at Durham University in 1999 discovered that exercise can be a suitable alternative to medication for the treatment of depression in older people.

Commenting on the University of Exeter research, David Stalker, CEO, FIA, said: "It's important to note that this is just one of countless studies into the complex relationship between exercise and depression.

"Numerous other studies have provided strong evidence that people who are more active have a greater sense of wellbeing and have lower rates of depression and anxiety.

"One possible explanation for the results of the Exeter study published today is the effectiveness of the mode of exercise delivery. Any physical activity provider must recognise that the typical barriers to getting active, such as lack of time, enthusiasm or confidence, will be significantly increased in a depressed individual or a person under significant stress."

To read the BMJ report in full, click here.