Are you habitual of taking afternoon naps? Well, take a reality check then, as a new study has suggested that dozing for more than 30 minutes can increase the risk of developing type two diabetes.

The study conducted on 27,009 people aged 45 or over, found that out of those who took naps, 40 percent had high blood pressure, versus 33 per cent who didn't take siestas, News.com.au reported.

Researchers from Huazhong University of Science and Technology in China also found that 24 percent of afternoon sleepers had high cholesterol, compared to 19 percent of those who stayed awake.

Scientists said napping for less than 30 minutes, or not at all, reduced people's chances of developing diabetes.

It was found that nappers were at high risk of diabetes, because they were less involved in exercised.