1 / 6

Principles of Motion and STability

Principles of Motion and STability. Chapter 3 . Movement Principles can be applied to a variety of movements to improve performance. Sir Isaac Newton’s 3 Laws of Motion (inertia) An object at rest stays at rest , and an object in motion stays in motion unless acted upon by another force

komala
Download Presentation

Principles of Motion and STability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Principles of Motion and STability Chapter 3

  2. Movement Principles can be applied to a variety of movements to improve performance • Sir Isaac Newton’s 3 Laws of Motion • (inertia) An object at rest stays at rest, and an object in motion stays in motion unless acted upon by another force • The amt. of acceleration an object has when you apply a force to it is proportional to the amount of force applied and inversely proportional to its MASS, • For every action there is an equal and opposite reaction.e.g. pushing off floor during walking – push down and back, you go forward and up Infants push more down than back and move slower as a result.

  3. Movement principles • Rotational force to linear force The objects linear velocity= rotational velocity and radius of rotation (thus a longer arm = greater force production) Shorter limb length = less resistance to motion Thus to produce a quick throw you need a compact motion To produce the greatest force you need a long motion. (e.g. javelin vs baseball) Ice skater Batter compact swing to start, full extension on contact

  4. Kinetic Chain – involvement of various muscles and body parts in a timed sequence to maximize force production. e.g. – throwing, batting, tennis serve, etc. • Force Absorption – the impact of a force is affected by the time over which the impact occurs and the area that the impact effects. • Knees bending decreases impact of jump • Knees straight increase impact of jump • “Giving” with ball • “Giving” with collision ---Stability= resistance to movement (large heavy box) --Balance= the ability to maintain equilibrium (equal distribution of wt.) around the Center of Gravity (CG) --Larger the base of support(BOS)=greater balance and stability --Balance = CG being over the base of support --The lower the CG is to the BOS, the more stable one is.

  5. In Locomotor Skills --You sacrifice stability in order to move --Alternating losing and gaining balance from one foot to the other --CG is pushed out over the BOS, and then the individual quickly moves his other leg forward to regain balance (dynamic balance).

  6. Website Document (Movement Principles) • Using Principles to Detect and Correct Errors • Complete and full observance of the movement (technology) • Analyze each phase and its key elements • Break it down into parts (kinetic chain) • Use movement principles to analyze the movement • Can you improve stability? • Kinetic chain sequence? • Release Point? • Correct errors through isolation and repetition

More Related