New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

KIN 362 Principles of Motion and Stability

by: Allie Newman

KIN 362 Principles of Motion and Stability KIN 362

Marketplace > University of Alabama - Tuscaloosa > Kinesiology > KIN 362 > KIN 362 Principles of Motion and Stability
Allie Newman
GPA 4.0
Motor Development
Tyler Williams

Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Class Notes 1-21-15, day 3, chapter 3
Motor Development
Tyler Williams
One Day of Notes
25 ?




Popular in Motor Development

Popular in Kinesiology

This 4 page One Day of Notes was uploaded by Allie Newman on Wednesday January 21, 2015. The One Day of Notes belongs to KIN 362 at University of Alabama - Tuscaloosa taught by Tyler Williams in Spring2015. Since its upload, it has received 129 views. For similar materials see Motor Development in Kinesiology at University of Alabama - Tuscaloosa.


Reviews for KIN 362 Principles of Motion and Stability


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 01/21/15
Allie Newman KIN 362 Principles of Motion and Stability Class Notes 12115 Chapter 3 Motor Development Similarities Predictable changes in movement patterns Humans share similar individual constraints 0 2 arms 2 legs and upright posture Environmental Principles 0 Gravity and other physical laws Calibration of Movement Example You are distracted while coming down a ight of stairs and you think that you have stepped off the last stair but there is actually still one more step Certain physical laws of motion bound or limit your movements Gravity all objects are attracted to each other and the amount of attraction depends on the objects masses 0 What goes up must come down People must calibrate their movements based on their individual constraints 0 Example overall body mass and strength 0 If I jump up I will fall back to the ground Understanding Principles of Motion and Stability Interaction of constraints encourages certain motor patterns while eliminating others Gravity an individual must activate certain postural muscles to assume and maintain a position even while executing a skilled movement An individual must work against gravity to become airborne If a person projects himself or an object at an angle versus straight up and down then the force of gravity makes the ight path a parabola Individual constraints of the performer in uence the movement pattern undertaken 0 Example squatting movement pattern and depth Individual Constraints 0 The shape and structure of the bones in different joints Knee joint encourages some movements while preventing others 0 Muscles have particular functional shapes and sizes and work to move bones around each other 0 The nervous system coordinates muscular contractions 0 Individuals use their bodies to move with a particular task goal in mind which also acts to constrain movements To develop their skills children and adults must learn to use movement patterns that optimize performance 0 The changes taking place in children s bodies due to growth and maturation complicate this process 0 Changing bodies mean changing individual constraints and the individual must recalibrate the interactions between individual and environmental constraints Understanding the principles of motion and stability physics of movement is critical in observing motor performance 0 Determining which movement patterns are likely to produce optimal results o Distinguish skilled movement patterns from unskilled patterns 0 KIN 365 Biomechanics Changes Are Predictable Changes 0 Can be seen across variety of motor skills 0 As we grow and mature often produce more force velocity or accuracy 0 Based on optimizing principles of motion and stability 0 Key Pointlj as movers become more pro cient at skills they often use the principles of motion and stability to their advantage Newton39s First Law 0 An object at rest stays at rest and an object in motion stays in motion until acted upon by a force Inertia l resistance to motion related to mass Momentum l the product of mass and velocity 0 Individuals must exert force to 0 Move ourselves move objects 0 More inertia means that o It is harder to move more force application is required 0 Lifting heavy versus light weights Newton39s Second Law Object s force is related to mass and acceleration o F M x A 0 Which would you rather shoot free throws with A bowling ball or a basketball 0 Basketball because it is lighter and not as much force needs to be exerted by us 0 How could we increase the force produced 0 Increase acceleration the speed Object s acceleration is related to force applied and inversely related to the mass 0 A F M 0 Small mass with large acceleration has same force as large mass with small acceleration Adding Distance to Improve a Kick 0 In order to kick and move an object example a ball more forcefully the child must 0 Increase step length preparatory period 0 Increase range of motion Throwing video how could you increase acceleration when throwing a ball 0 Using a shuf e running start or wind up preparatory period 0 Full extension increase rotary distance Newton39s Third Law 0 To every action there is an equal and opposite reaction 0 When you push on something it pushes back on you example pushing on a wall 0 Walking 0 Individual downward and backward push 0 Surface upward and forward push Directional Force o For best motor performance move in one plane 0 Example movement patterns of newly walking toddler Much of their force is directed downward but not backward This allows them to move without compromising balance but forward progression is slow Oppositional Movements o Locomotor movements 0 Example movement patterns while running Lower body twists one way and upper body twists opposite way One leg swings forward and arm on that side of body swings backward in reaction Oppositional arm and leg movement characteristic of skilled locomotor movement Increasing Velocity Rotating Limbs and Projected Objects lncrease rotational velocity swing it faster lncrease relative length fully extend it at release or contact not before 0 Why not keep limb extended throughout baseball The armleg would have too much rotational inertia too much resistance Longer limbs more resistance to motion 0 Bending limb decreases the energy necessary to move limb Open Kinetic Chain Perfectly timed sequence of movements used to perform a motor skill 0 Example the high jump Force and Time 0 To make an object move increase force application for a given time 0 Example karate chop to bricks To make an object stop increase time or area over which a given force is applied 0 Example gymnastics jumps and ips soft landing in gymnastics Stability and Balance 0 Both essential for motion but do NOT mean the same thing 0 Stability l ability to resist movement Increasing stability ensures balance 0 Balance l ability to maintain equilibrium Maintaining balance does not guarantee stability Stabilitymobility tradeoff 0 Stability may inhibit decrease mobility Example starting spring position 0 Kinetic chain mobility and stability ofjoints Increasing Stability Methods to increase stability 0 Increase base of support 0 Lower the center of gravity Increasing Balance 0 Methods to increase balance 0 Increase stability 0 Improve strength coordination and proprioception Conclusion 0 The principles of motion and stability apply to all actions and objects 0 Be aware of changing individual constraints 0 Manipulate task and environment to aid in optimal skill performance 0 Not everyone will become pro cient


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Anthony Lee UC Santa Barbara

"I bought an awesome study guide, which helped me get an A in my Math 34B class this quarter!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.