CYBEX Free Weight Owner's Service Manual page 43

Cybex Free Weight Owner's Manual
External Force - a push or pull on the body that arises from a source outside the body.
External Rotation - movement of the anterior surface of a segment away from the mid-line; also
termed lateral rotation.
Fast-twitch Fibers - skeletal muscle fi bers most active in short-duration, intensive exercise, e.g.,
in sprints and jumps.
Fatigue - the inability to maintain a given level of physical performance.
Flexibility - the range of movement of a specifi c joint or group of joints, infl uenced by the associated
bones and bony structures, muscles, tendons and ligaments.
Flexion - movement about a joint in which bones on either side of the joint are brought closer together,
decreasing the angle of the joint. Joint movement away from anatomical position, occurring within the
sagitial plane.
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.
Force Couple - concentric/eccentric contractions of opposing muscles acting to produce motion while
maintaining a relatively fi xed 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.
Hypertrophy - increased cell size leading to increased tissue size.
Impulse - the change in momentum.
Inertia - the tendency of a body to remain at rest or continue in motion unless disturbed by an external
force.
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.
General
Exercise
Guidelines
Page 3-5