WELCOME TO KIN 241A: Biomechanics Course Instructor: Professor Bob Vigars web site http://instruct.uwo.ca/kinesiology/241a Student obligations in class out of courtesy & respect for all: 1. During class, only talk when requested by instructor 2. Put away any newspapers and be attentive to class 3. Turn off cell phone and internet connection 4. No food or drink in classroom 5. Place any refuse in appropriate bins in classroom

BIOMECHANICS APPLICATIONS Basic Movements  Target Movements  Adaptive Movements  Walk Pull Run Push Jump Throw Swim Strike Lift Daily Work Sport Air Environment Water Environment Ergonomics Gerontological Orthopedic Sport Injuries Prosthetic

OPO: Project for Max DistanceHORZ

OPO: Project for Max DistanceVERT

OPO: Project for Accuracy

OPO: Accuracy with Speed

OPO: Manipulate a Resistance

OPO: Move Over a Timed Distance

Move Body in an Ideal or Model Pattern                                                                                                                       Move Body in an Ideal or Model Pattern

OPO: Interact with the Environment

DEFINITIONS Biomechanics - mechanics of structure & function Mechanics - statics & dynamics Statics - nonmoving systems Dynamics - kinetics & kinematics Kinetics - forces that cause movement Kinematics - describing motion

Kinetics - forces friction gravity muscle pressure reaction buoyancy centripetal elasticity fluid drag fluid lift friction gravity muscle pressure reaction

Kinematics- describe movement velocity - m/sec., degrees or rads/sec. (57.3°) acceleration - change v OR change direction displacement - in meters or degrees / radians momentum - M = mv (linear) OR L = I (rotary)

Efficient Movement minimal energy expenditure necessary for endurance sports and repetitive tasks in labor allows performer to endure longer allows performer to performer faster with less energy expended

Effective Movement not concerned with efficiency most appropriate movements to achieve Mechanical Purpose [MP] aka Overall Performance Objective [OPO] most appropriate sequence of movements [e.g. large parts then small parts]

Assignment for Next Class Read Chapter 1 pages 1-6 Answer Questions # 1,3,5,6 on page 6 Read Module A pages 7-22 Answer Questions # 1,3,4,5,6 on page 22 http://instruct.uwo.ca/kinesiology/241a