Kinesiology 3457A/B Lecture Notes - Lecture 2: Nikolai Bernstein, Binary Logarithm

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3457A/B
• Professor: Anita Christie

Document Summary

What is ergonomics: safety - no injury or illness, avoid accidents, ef ciency - waste as little time, effort, and error as possible. Degrees of freedom problem: there are multiple ways for someone to perform a movement in order to achieve the same goal. Nikolai studied blacksmiths, who"s job is to hit the same point repeatedly. After nikolai became interested in this, he tracked the hammer every time the blacksmith swung it through a range of motion. He found that there was some variability in how the blacksmith produced the results through a different range of motion, but still hitting the same spot. *theres an in nite number of solutions to achieve the same goal. Degrees of freedom problem (bernstein)= ringing a doorbell and pitching a baseball. Problems arise because of the (1) inability to learn a new task and (2) because we sometimes ignore how someone performs a movement and only focus on the outcome.