The Lunge Twist w/ the MostFit Core Hammer
is a great Strength and Conditioning move with a number of variations. The lunge itself, when done properly, provides a great core, glute, quad, hamstring, adductor, and stability challenge, among many other attributes. Add the Core Hammer, with its, distally loaded weight, and you have a whole other set of challenges.
Consult a physician before performing this or any exercise program. You as the user are responsible independently for use of any fitness programs or equipment and assume the risks of any resulting injury.