BROWN FAT Shivering could count as exercise, study finds BBC NEWS Aired - 5 February 2014 Article Reference

Shivering for... 10-15 minutes a day could be equivalent to doing an hour of exercise, a study suggests.

Scientists from Sydney University placed volunteers in temperatures below 15C for the experiment.

They found that the process triggered hormonal changes producing... BROWN FAT - which burns energy to keep warm.