Jog on the spot

A quick and easy exercise suitable for beginners; that can be made more difficult for progression if required.
Workout focus:	Heart, lungs & legs
Type of activity:	Endurance
Benefits:	Increased fitness & calorie burn
Time needed:	3 minutes performing continuously
Intensity level:	Varied
Instructions:	Literally - jog on the spot! Make sure you keep your knees soft as you move.
How to make it more difficult:	To make the exercise easier, march on the spot or do not lift your legs as high as when you jog. To make it harder, go faster and/or lift the legs higher.