This factor is important if it occurs to a considerable degree and requires full use of the lower extremities and back muscles; Kneeling: Bending legs at knee to come to a rest on knee or knees; Crouching: Bending the body downward and forward by bending leg and spine; Reaching: Extending hand(s) and arm(s) in any direction; Standing: Remaining upright on the feet, particularly for sustained periods of time; Walking: Moving about on foot to accomplish tasks, particularly for long distances or moving from one work site to another; Pushing: Using upper extremities to press against something with steady force in order to thrust forward, downward or outward; Pulling: Using upper extremities to exert force in order to draw, drag, haul or tug objects in a sustained motion; Lifting: Raising objects from a lower to a higher position or moving objects horizontally form position to-position. This factor is important if it occurs to a considerable degree and requires the substantial use of the upper extremities and back muscles; Fingering: Picking, pinching, typing or otherwise working, primarily with fingers rather than with whole hand or arm as in handling; Grasping: Applying pressure to an object with the fingers and palm; Feeling: Perceiving attributes of objects, such as size, shape, temperature or texture by touching with skin, particularly that of fingertips; Talking: Expressing or exchanging ideas by means of the spoken word; those activities where detailed or important spoken instructions must be conveyed to other workers accurately, loudly, or quickly; Repetitive motions: Making substantial movements (motions) of the wrists, hands, and/or fingers.