PEDS207 Lecture Notes - Mechanical Advantage, Peer Pressure

• School: University of Alberta
• Department: Physical Education and Sport
• Course: PEDS207
• Professor: Jody Virr

Document Summary

Nov 29 development of strength and flexibilty chapter 16. There"s an increase in fiber diameter: women tend to have a smaller muscle mass. Men have more muscle mass in their upper body: around 20-50 years, there is a slight decrease in muscle mass, after 50, there is more of a decline in muscle mass. Cross sectional area: the larger the muscle (the cross sectional area), the more force a muscle can produce. Neurological factors: strength is also determined by how many fibers we can recruit, whether we can recruit only those fibers needed. It also depends what type of lever we are working with and where that muscle force is applied. Class 2 levers have a long moment arm. It gives us a significant mechanical advantage. (ex. Bicep curl) elbow is fulcrum, weight is working hand and muscle force is working near elbow. Strength doesn"t always change in parallel with muscle size.