Moment Arm In the context of strength and conditioning, a moment arm explains why an exercise feels harder or easier at certain joint angles, because it determines how much torque the muscle must produce to move or control a load. It is tightly related to concepts of lever classes and, in part, helps to determine the sticking point of an exercise. Definition: The moment arm is the perpendicular distance between a force’s line of action and the axis of rotation at a joint. In resistance training: - It determines how much torque (rotational force) is produced at a joint. - A longer moment arm = more torque required from the muscle. - A shorter moment arm = less torque required. Example: During a biceps curl, the moment arm of the external load is greatest when the forearm is around 90° of elbow flexion, which is why the lift feels hardest there. Lock this concept in with your own training. When an exercise feels harder at certain joint angles or through a specific ROM, it’s likely because the moment arm is larger and the muscle has to produce more force. Question: Have you ever tried or prescribed targeted isometric or partial ROM work at the sticking point of a lift? For example, pause squats, pause at the knee deadlifts or cleans, spoto press, etc.?

Any opinions on the Muscle and Motion app for learning the roles of muscles in movement (agonists, antagonists, etc.) during specific joint actions? Is it a trustworthy source for learning, or would you recommend any books instead? I’m asking because many books seem to describe muscle activation differently during specific joint movements.

Where do you write programs. Excel? Paper? Code? AI?

Hi Cohort 3 Coaches, What chapters are we talking about on Monday 4/13. Thank you.

Hey Guys! I’m new here. I bought the course on Monday, but I don’t know how can I have access to the lectures and the other course materials. Could someone help me please?