Purpose: These movements will help to improve your agility for all running, jumping and cutting activities, which are important in many sports. Try to swing your arms as you switch legs, and don't go so fast as to lose your form.
How to do it:
* Stand with one foot in front of the other and both knees bent.
* Jump up into the air and switch the position of both legs, so you are landing with the opposite leg in front with both knees bent.
* Repeat this switching legs back and forth quickly at least 10 times before taking a break.