In this short instructional video, the speaker points out a common mistake people make when training their forearms: using a reduced range of motion (amplitude) during wrist flexion exercises. He explains that a smaller amplitude lowers the muscular demand, resulting in less effective work and insufficient tissue damage, which is essential for hypertrophy. The speaker also notes that the reduced range can produce a strong burning sensation (muscle acidosis) that many mistakenly interpret as a sign of a good workout, while in reality the crucial micro‑damage that drives growth is missing. He emphasizes the importance of fully extending and flexing the wrist to maximize stretch, tissue damage, and muscle growth, and mentions that he frequently has to correct this error in his clients.
