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29 Cards in this Set
- Front
- Back
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Biomechanics |
The study of movement |
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Stability |
The ability to maintain a balanced state |
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Force |
The interaction that creates work, action, or physical change |
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Magnitude |
How much force is applied to the dumbbells, barbells, or machine handles |
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Direction |
The way in which the force is applied |
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Point of application |
Where the force is applied on the body or implement being used |
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Line of action ( line of force) |
An imaginary straight line drawn from the point of application of force through the direction of force |
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Angle of pull |
The angle at which a muscle pulls relative to the long axis of the bone on which it pulls |
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Work |
Force times distance. Measured in foot pounds and similar units. |
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Power |
The work done in a unit of time |
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Inertia |
The tendency for an object to remain in its current state. (At motion or at rest) |
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Resting inertia |
An object is at rest, it will stay at rest unless acted upon by some outside force |
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Moving inertia |
An object that is in motion will stay in motion unless acted upon by some outside force |
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Range of motion (ROM) |
The movement of a joint from full flexion to full extension |
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Mass |
A body of coherent matter |
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Acceleration |
The rate of change of velocity per unit of time |
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Velocity |
The speed of something in a given direction |
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Momentum |
The quantity of motion of a moving body, measured as a product of its mass and velocity |
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Lever |
Rigid bar that turns about an axis of rotation or a fulcrum |
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Fulcrum |
The point on which a lever rests or is supported and on which it pivots |
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First-class lever |
Fulcrum in the middle, the effort is applied on one side of the fulcrum in the resistance on the other |
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Second-class lever |
A lever in which the load lies between the fulcrum and the effort |
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Third-class lever |
A lever in which the effort is placed between the fulcrum and the load |
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Torque |
The magnitude of twist around an axis of rotation (fulcrum) |
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Gravity |
The downward pulling force that creates resistance |
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Center of gravity |
The points in the body around which your weight is equally distributed |
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Line of gravity |
A vertical line straight down from the center of gravity |
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Kinesthesis |
The ability to perceive your position and movement of the body or body limbs in space |
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Visual reference point |
A chosen point of focus to aid in stability and balance |
