Biomechanics Forces Today's session will cover Definition of Biomechanics Employment opportunities Force Center of gravity Base of support.

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Presentation transcript:

Biomechanics Forces

Today's session will cover Definition of Biomechanics Employment opportunities Force Center of gravity Base of support

Introduction What is Biomechanics? Why do certain people perform better than others? Breakdown of biomechanics Bio- Mechanics-

Employment What people can assist athletes through knowledge of Biomechanics ? Coaching Podiatrists Physiotherapists Teachers Dance Instructors Fitness Trainers Graphic designers

Force A force is a PUSH or a PULL Gravity is a force which acts on all things downwards towards earth. The effect gravity has on an object is proportional to its mass. E.g. the heavier an object is the greater the attraction between it and earth. Why do we weigh less on the moon?

Force When a force acts on a body it can produce 3 types of movement. Deformation Translation Rotation

Translation Something which moves from A > B For Example; a golf shot. It starts on the tee and finishes on the fairway.

Rotation If a force applied is not through the CoG (centre of gravity) the object will rotate. For Example; putting spin on a volleyball serve

Deformation The object loses shape on impact. For Example; a squash ball being hit.

Gravity The main force acting on all parts of the body is As a consequence, it must be centred some where in the body. This is known as the Centre of Gravity

Centre of Gravity The part in the body in which all parts of the body are in balance or the point at which gravity is centered.

When we stand in the anatomical position, our COG is located around the hip region. In men, the COG is approximately 57% of standing height, in women 55%. Why is COG lower in women than men? More mass is concentrated around the hips and below in women.

When we produce rotation as a consequence of a force being applied, the body rotates about the COG These are known as the Axes of Rotation

Center of gravity Mark the center of gravity Keeping the boomerang in mind, why is the Frosby flop more effective than the scissors in high jump?

Base of support The area of the body in contact with the ground, that stabilizes the body.