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Cybex VR2 Owner’s Manual
General
Exercise
Guidelines
Page 2-6
Foot-Pound - the work required to move one pound of resistance one foot in distance.
Force - an interaction between two objects, in the form of a push or pull, that may or may not
produce motion, Force = mass x acceleration.
Force Angle - (FA) the angle between the action line and the lever, on the side of the joint
axis. It is not directly related to the joint angle and changes as the muscle’s relationship to the
bone changes during motion
Force Couple - concentric/eccentric contractions of opposing muscles acting to produce
motion while maintaining a relatively fixed axis of rotation. A prime example occurs in the
shoulder, where the deltoid and rotator cuff muscles’ divergent pull create an almost perfect
spinning of the humeral head around a fixed axis of rotation.
Frontal Plane - (coronal) imaginary line that divides the body into anterior and posterior
halves; lies at a right angle to the sagittal plane.
Fulcrum - the support on which a lever rotates in moving or lifting.
Hyperextension - continuation of the movement of extension past the neutral position.
Hypertension - a chronic elevation of arterial blood pressure which is a primary risk factor for
coronary artery disease and stroke.
Hypertrophy - increased cell size leading to increased tissue size.
Impulse - the change in momentum. This becomes a concern in weight training, due to the
possible negative effects associated with it.
Inertia - the tendency of a body to remain at rest or continue in uniform motion unless acted
on by an unbalanced force. Represents Newton’s first law, the law of inertia.
Inferior - a lower position upon or within the body.
Insertion - the more distal attachment site of a muscle. The movable part or attachment of a
muscle as opposed to origin.
Intermittent Work - work sessions interrupted by rest sessions.
Internal Forces - act on the body and arise from sources within the human body.
Inversion - moving the sole of the foot inward. Opposite of eversion.
Isokinetic Contraction - a muscular contraction through a range of motion at a constant
velocity. The rate of movement is maintained at a constant velocity through a specific range of
motion even though maximal force is exerted.
Summary of Contents for VR2
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