![]() ![]() It sits on the lateral side of the upper forearm and acts as a flexor, supinator, and pronator. Brachioradialis: The brachioradialis is the elbow flexor that sits on the forearm rather than the upper arm.While the brachialis sits under the biceps, they still play a major role in the overall size of your arm. The brachialis will receive more activation as the arm rotates from supinated to pronated. In fact, the brachialis is actually the primary flexor of the elbow, generating 50-60% of the force. Brachialis: The brachialis sits on the upper arm and is unique in that it only has one job: to flex the elbow.However, it loses significant power as the arm rotates inward. ![]() The supinated position is also where the biceps are most powerful as an elbow flexor. The biceps are also responsible for the elbow’s supination. This is one of the reasons people’s elbows will pull forward when performing curls. Most people don’t know that it’s actually a biarticular muscle, meaning that it’s actually responsible for flexion of the elbow and stabilization. Biceps Brachii: The biceps brachii, more commonly known as the biceps, is perhaps the most popular muscle on the human body.Together, these three muscles work to flex the elbow as well as with supination and pronation of the arm: Two of these muscles are located on the upper arm and one muscle is located on the forearm. While most think of the biceps when they think of arm flexors, there are actually three different arm flexors. The Anatomy And Function Of The Elbow Flexors: The Biceps, Brachialis, Brachiosradialis: That being said, their main focus is to train your arm flexors. ![]() Sitting, standing, palms up, palms down, with dumbbells, performing barbell curls, with weight plates - there are literally dozens and dozens of different ways to do arm curls, and they all have their own little uniqueness in the way they train the arms. The term “arm curls'' can refer to any number of isolation exercises that consist of the arm flexing at the elbow joint. When a joint is extended, it opens and when it flexes, it closes.
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