When performing your classic dead bug, you’ll extend one arm and the opposite leg, then switch sides. For an ipsilateral dead bug, you’ll work on one side at a time, forcing your stabilizing muscles ...

While sit-ups remain popular at gyms ... Lie on your back with your knees lifted to a reverse tabletop position and your fingertips gently placed at your temples Lift your shoulder blades away ...

While sit-ups and crunches are great for building strength and stability in your core, they aren’t essential. If you’re bored of your regular abs workout, I’ve found your new go-to routine ...