Movement: Begin with your hands and knees on the floor. Keeping your back straight, slowly and carefully raise up onto your hands while lifting your legs off the ground, and bending your knees to 90 degrees. The more you curl your lower legs up, the easier the exercise will be, while the farther you extend them the more difficult (and closer to a full planche) the exercise will be.
Strength criteria: Straddle planches.
Caution: Be careful not to allow your weight to fall forward over your hands, as this could clearly jeopardize the health and beauty of your face.