KINE 1020 Final: KINE 1020 All Lectures

• School: York University
• Department: Kinesiology & Health Science
• Course: KINE 1020
• Professor: Michael Riddell

Document Summary

Muscle functions, movement and order of fibre type. Motor unit recruitment is a good way to produce a force. Increase the amount of motor units working=increase force. As force increases and more motor units are recruited, different movement types or motor skills occur at different levels with different metabolic requirements. Type 1 fibres are the primary unit required for walking. Slow fibres don"t produce much force, so although little force is generated for walking, some of these motor units will be heavily involved in this walk. If we had a task that required 10kg of force and capacity for slow muscle was 10kg, we could use this 10kg to generate force, thus this muscle is working quite good to sustain this action. Type iia fibres for brisk walking or jogging. More motor units are recruited to produce a greater force to sustain the tasks. Type iix fibres used for jumping or sprinting, recruit even more motor units!