Come into an all fours position on an exercise mat, with your hands directly under your shoulders and your knees directly under your hips. Shift your weight forward onto your shoulders as you simultaneously drop your hips. You should have an unbroken line from your shoulders to your knees. This is your start position. Keeping you core braced, lower your chest towards the ground by bending your elbows until your chest is just above the ground. Inhale as you do so. You should maintain this unbroken line from your head to yours knees throughout this lowering phase. Pause at the bottom of the movement, then press upwards from your chest and shoulders, straightening your arms as you return to the start position. Exhale as you do so. Repeat for the required number of reps (or time).