The Strength, Endurance and Sandbag Series are advanced programs that are a progression from the NOFFS operational series. The Strength Series helps to develop the strength that is needed to perform at the highest of levels. The Endurance Series focuses on developing cardiovascular fitness while providing training methods to improve muscular strength. The Sandbag Series provides you with a training plan that develops the strength and power needed to meet performance demands placed upon you in any environment. Workouts based on the NOFFS principles and Active Duty /FEP friendly.