"If you don’t fancy braving the gym or the traffic, why not set up a stationary bike in front of your TV? Pedal away in front of your favourite shows and before you know it you’ll have done 10 minutes. This works just as well if you prefer using a treadmill. Ten minutes of moderate cycling will burn around 62 calories, and the same time on the treadmill will burn 97 calories."
http://www.nhs.uk/Livewell/loseweight/Pages/Tenminuteworkouts.aspx