CYBEX VR2 - Page 21

General
Exercise
Guidelines
Page 2-5
Cybex VR2 Owner’s Manual
Distraction - two forces acting along the same line and in opposite directions, they constitute
a distractive, tensile load or tensile stress.
Diathrodial Joint - ball and socket joint.
Distal - furthest from the attached end of the limb; away from the body.
Dorsal - pertaining to the back; opposite of ventral, palmar or plantar.
Dorsiflexion - movement of the foot up in the sagittal plane; movement toward the leg.
Eccentric Action - muscle action in which tension is developed in the muscle while it is
lengthening. Negative work is performed.
Endurance - the ability to persist in performing some physical activity.
Energy - the capacity to perform work.
Energy (Kinetic) - energy associated with motion.
Energy (Potential) - energy by virtue of position.
Energy System - one of three metabolic systems involving a series of chemical reactions
resulting in the formation of waste products and the manufacture of ATP.
Eversion - movement of the sole of the foot outward; opposite of inversion.
Extension - movement about a joint in which bones on either side of the joint are brought
away from each other, bringing two parts into or towards a straight line, increasing the angle
of the joint. Returning to anatomical position from a position of flexion in the sagittal plane.
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 fibers 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 specific joint or group of joints, influenced 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 sagittal plane.