Ab CurlBy Jeff GarrettMarch 9, 2013 The Essence of Exercise: Always keep one leg straight. This helps to maintain the neutral spine during the exercise which keeps spine loads lower than if…
Lying Hip ExtensionBy Jeff GarrettFebruary 27, 2013 The Essence of Exercise: Lie on your back with your knees bent and feet flat on the floor. Brace your abs, and contract your glutes (butt…