Step 1: Sit straight in your chair with both feet on the floor.
Step 2: Extend your right leg until it's level with your left knee.
Step 3: Keep the right leg straight and hold in place for 5-10 seconds.
Step 4: Lower the leg back to the ground.
Step 5: Repeat, alternating legs, for 15 reps.
Step 6: To make the exercise more challenging, loop your purse or briefcase strap over your ankle for added weight.
Put together your own office fitness routine by reviewing the exercises in our Workplace Fitness Library.