Principles of Stability

Stability principles give athletes rules about holding positions and staying on balance when running. They guide training for improving firmness of positions both for static balance and dynamic balance.

1. Principles of stability Dr. Shruti Pandey, PT, Gold Medalist PRINCIPLES OF STABILITY 1

2. PRINCIPLES OF STABILITY 2

3. What is stability? Stability is the state when all the forces acting upon a body are perfectly balanced and the body remains at rest. PRINCIPLES OF STABILITY 3

4. Principle 1 The lower the center of gravity, the greater will be the stability. PRINCIPLES OF STABILITY 4

5. APPLICATION The easiest & safest pyramids for beginners are those in which the participants are on their hands & knees. PRINCIPLES OF STABILITY 5

6. CONTD.. A wrestler tries to remain as stable as possible by lowering his center of gravity. PRINCIPLES OF STABILITY 6

7. PRINCIPLE 2 Greater stability is obtained if the base of support is widened in the direction of the line of force. PRINCIPLES OF STABILITY 7

8. APPLICATION In pushing and pulling heavy furniture, he/she can put his whole body into the act without loss of balance PRINCIPLES OF STABILITY 8

9. CONTD.. While catching a fast moving object like a baseball or a heavy one like a medicine ball, widening the base in the direction of the force enables the catcher to “give” as he catches and in this way to provide a greater distance in which to reduce or stop the motion of the object. PRINCIPLES OF STABILITY 9

10. CONTD.. The military “at ease” is more stable than the position of “attention”. PRINCIPLES OF STABILITY 10

11. PRINCIPLE 3 For maximum stability the line of gravity should intersect the base of support at a point which will allow the greatest range of movement within the area of the base in the direction of forces causing motion. PRINCIPLES OF STABILITY 11

12. APPLICATION A football player knowing he will be pushed from in front, should lean forward so that he can “give” in a backward direction without losing his balance. PRINCIPLES OF STABILITY 12

13. CONTD.. A person in a tug-of-war line leans backward in preparation for absorbing a strong forward pull from opponent. PRINCIPLES OF STABILITY 13

14. PRINCIPLE 4 Other things being equal, the greater the mass of a body, the greater will be its stability PRINCIPLES OF STABILITY 14

15. APPLICATION In sports in which resistance to impact is a factor, heavy, solid individuals are more likely to maintain their equilibrium than lighter ones. PRINCIPLES OF STABILITY 15

16. PRINCIPLE 5 Other things being equal, the most stable position of a vertical segmented body (such as a column of blocks or the erect human body) is one in which the center of gravity of each weight-bearing segment lies in a vertical line centered over the base of support or in which deviations in one direction are exactly balanced by deviations in the opposite direction. PRINCIPLES OF STABILITY 16

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18. APPLICATION This applies to postural adjustments for achieving a pleasing, well-balanced alignment of the body segments, both with and without external loads . Proper alignment of the body puts less stress on the spine and helps you have a good posture. PRINCIPLES OF STABILITY 18

19. PRINCIPLE 6 Other things being equal, greater the friction the between supporting surface and the parts of the body in contact with it, the more stable the body will be. PRINCIPLES OF STABILITY 19

20. APPLICATION The wearing of cleats and rubber-soled shoes for sport activities not only aids in locomotion but also serves to increase one’s stability in positions held momentarily between quick or forceful movements, as in basketball , football and other sports. PRINCIPLES OF STABILITY 20

21. CONTD.. PRINCIPLES OF STABILITY 21

22. CONTD.. PRINCIPLES OF STABILITY 22

23. PRINCIPLE 7 Other things being equal, a person has better balance in locomotion under difficult circumstances when he focuses his vision on stationary objects rather than on disturbing stimuli. PRINCIPLES OF STABILITY 23

24. APPLICATION Beginners learning to walk on a balance beam or perform balance status and others who for any reason have difficulty in keeping their balance can minimize disturbing visual stimuli by fixing their eyes on a stationary spot in front of them, either at eye level or somewhat above eye level. PRINCIPLES OF STABILITY 24

25. PRINCIPLE 8 There is a positive relationship between one’s physical and emotional state and the ability to maintain balance under difficult circumstances. PRINCIPLES OF STABILITY 25

26. PRINCIPLE 9 Regaining equilibrium is based on the same principles as maintaining it. PRINCIPLES OF STABILITY 26

27. APPLICATION Upon lending from a downward jump, stability may be more readily regained if the weight is kept evenly distributed over both feet or over the hands and feet, and if a sufficiently wide base of support is provided. PRINCIPLES OF STABILITY 27

28. REFERENCES BASICS OF KINESIOLOGY : WELLS PRINCIPLES OF STABILITY 28

29. THANK YOU PRINCIPLES OF STABILITY 29