All of the exercises use a dumbbell, so you’ll want to have a set of the best adjustable dumbbells on hand. At the top of the workout, Juice and Toya recommend using a dumbbell between 2-25lb (2-12kg) ...

While performing a squat may seem like a no-brainer, experts say that having the correct form is essential for maximizing the exercise's benefits.

If you're still relying on crunches ... a squat position. – Keep your knees at a 90-degree angle and your back flat against the wall. – Extend your arms straight in front of you, then twist your torso ...