KNES 373 Lecture Notes - Lecture 8: Maximum Force, Motor Unit, Injury Prevention
8 Feb 2019
School
Department
Course
Professor
Document Summary
Knes 373 lecture 8 force, velocity, and power. Overview: force - velocity relationship, power velocity relationship, effects of muscle temperature on power. Interaction between thick and thin filaments and the extent to which they do or don"t overlap. If muscle is too stretched out or too short, we cant get enough force production: force-velocity relationship (aka torque - angular velocity relationship) = the speed of contraction affects the maximum force that can be produced. Henneman"s size principle: explains how muscles are recruited, the size principle is depicted in this figure in which each circle represents a motor unit made up of different types and numbers of fibers. The maroon circles are type i motor units and the light tan circles are type ii motor units, with larger circles depicting larger motor units containing more fibers. Low forces and low speeds = more recruitment of type i (slow) fibers.
