With the days getting shorter and weather getting colder, day-to-day exercises such as walking to the shops will soon be replaced by a quick drive in the car. Instead of having a lovely picnic in the park, you may soon be watching a movie under a blanket.

If you are worried about putting on a few lbs, don't fret! I have you covered. 

Follow this 13-minute circuit, 3 times a week to burn calories and define your muscles over the coming months.