Headbangers are a gimmick..
People do this exercise to show off and look cool in calisthenics.
Headbangers are an inferior bicep exercise thanks to momentum. The isometric elbow flexion is misguided effort if the goal is hypertrophy.
Don’t re-invent the wheel, stick to classic compound and isolation exercises for bodybuilding.
What’s wrong with bicep curls and chin-ups instead?
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