The SIFT Way® Strength Training Muscular Strength and Endurance is developed by the overload and specificity principles by increasing the resistance to movement and/or the frequency of duration of activity to levels above those normally experienced. Muscular strength is the amount of force a muscle or group of muscles can produce. Muscular endurance is the ability of a muscle or group of muscles to perform repeated contractions. Both muscular strength and endurance are important components of physical fitness, and adequate levels of both are necessary to perform everyday tasks. Muscular Endurance is best developed by using lighter weights with a greater number of repetitions. Muscular Strength is best developed by using heavier weights with a lesser number of repetitions. The American College of Sports Medicine (ACSM) recommends performing a minimum of 2 strength and endurance workouts per week. The following is the National Strength and Conditioning Association's (NSCA) recommendations for resistance training frequency based on training status is: Beginner 2-3 times per week Intermediate 3-4 times per week Advanced 4-7 times per week To Read Our Fitness Articles - Click Here