When it comes to defining your lower body, weighted lunges, deadlifts and squats are unsurpassed. Not everyone, however, has access to a gym, but some basic gear such as a stability ball, dyna disc, BOSU and jump rope can give you a leg up on a home workout. For this simple hamstring exercise, all you need is a BOSU. Although it lacks a certain degree of difficulty, that doesn't mean your hammys won't be hollering.

Position the BOSU so that the inflated side is facing the floor. Lie face up on a mat and place your feet on the center of the BOSU platform. With your palms facing down, extend your arms directly out from your body or right below your hips.

Elevate your hips by squeezing your glutes and then move the BOSU forward and back by contracting your hamstrings. Try 15-18 reps and then lower your hips back to the starting position.