Explainer Zone™ on Instagram: "This frame captures the extreme biomechanics behind a professional fastball—something the human body was never naturally designed to handle, yet evolved athleticism and training make possible. When a pitcher throws at full speed, the arm rotates at over 7,000 degrees per second, generating forces close to 1000 Newtons on the elbow and shoulder—strong enough to cause serious injury without perfect technique and conditioning. The stride, hip rotation, and torque show