Modified Jumping Jacks
Stand tall with your back straight, abs engaged, shoulders relaxed, arms at your sides, and feet together.
Breathe deeply, bending your left knee slightly while extending your right arm overhead and stepping your right leg out to the side. Return to the start position, standing tall. Switch sides by bending your right knee slightly, extending your left arm overhead and stepping your left leg out to the side; return to the start position and repeat side to side.
Envision yourself making one-half of a Jumping Jack to perform this movement. Move quicker and/or step out farther to increase the intensity of this movement.