Time for the Quadruplex! This simple exercise can be done anywhere and anytime without machines or equipment and it benefits anyone. Join Marzia Prince—Healthy Housewife, fitness trainer, and health expert—as she demonstrates one of the easiest workouts you can do that will still tone a good percentage of your body: shoulders, back, glutes, hamstrings, and abdominals. Improve your stability, balance, posture, and your core all at once in just minutes.