What Are Fast Twitch Fibers?

Instrument for single fiber torsional fatigue testing. The miniature DC motor has a fiber chuck at the shaft end, which can be clamped on the axis. The shaft end is vertically downward. The fiber is suspended for a certain length. The lower end has a tension weight and an anti-rotation frame. The number of rotations, the fiber is subjected to a certain twist in the Z direction and the S direction. When twisting breaks, the instrument records the number of torsional fatigue resistance. ^[1]