A Quick Lesson on Moment Arms and Lever Efficiency In strength training, the moment arm refers to the distance between the line of force and the main working joint. For free weight exercises, the line of force is usually a straight line drawn upward from the center of mass of the weight — typically from the barbell or dumbbell handles — directly opposing gravity. The longer the moment arm, the more force the muscles must produce to move the load. This increases mechanical tension on the muscles,
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A Quick Lesson on Moment Arms and Lever Efficiency In strength training, the moment arm refers to the distance between the line of force and the main working joint. For free weight exercises, the line of force is usually a straight line drawn upward from the center of mass of the weight — typically from the barbell or dumbbell handles — directly opposing gravity. The longer the moment arm, the more force the muscles must produce to move the load. This increases mechanical tension on the muscles,
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