Bring yourself to the ground and enter a high plank position with your hands directly under your shoulders and your feet directly behind you. Carefully, insert one foot at a time into hanging TRX straps. With both feet securely in the straps in a high plank position, proceed to quickly bend one knee at a time and bring it towards your chest. Repeat the movement quickly on the other side. Keep alternating legs at speed whilst keeping your core contracted throughout. Be sure not to let your hips drop.