Performing the: A Step-by-Step Tutorial Negative Crunch
Place your hands lightly behind your head or crossed over your chest, and engage your core by pulling your belly button towards your spine.
Slowly lift your upper body towards your knees, using your abdominal muscles and not your neck or shoulders, until your shoulder blades are off the ground.
Hold this position for a moment, then slowly lower your body back down, resisting the pull of gravity to engage your abs even more.
Repeat this movement for your desired number of repetitions, making sure to maintain control and proper form throughout each crunch.