Take just 5 minutes of your day to strengthen your core with the MARRKO CORE Complete Core Workout. Targeting 29 of your muscles, it helps to stabilize your spine for tons of health benefits. The MARRKO CORE helps workout both your upper and lower body by engaging all of your core muscles. In addition, it puts your torso rotators to work. Altogether, you get a slimmer waist and an impressively strong core. As a result, the MARRKO CORE helps to improve back pain. In addition, your posture will improve over time. The MARRKO CORE is totally adjustable so you can choose the intensity that is best to achieve your goals. Plus, weighing only 10 oz., it also fits in your pocket so you can take it anywhere and everywhere.