Core, Hips, Legs, Glutes
1. Kneel on a mat and place your elbows under your shoulders, perpendicular to your body.
2. Extend your legs to the back with your forefeet on the mat, so that your head, body and heels are aligned in a straight line.
1. Engage your core and jump both your feet out wide to the sides.
2. Quickly jump both your feet back together into plank position. Repeat.
1. Keep your back flat and your hips up (don't let it drop) throughout the exercise.