arms (see also anatomy file, click
the word "arm" to refer to the humerus. The world "forearm"
is used to refer to the radius and ulna. The muscles described in
section "anatomy" all have their bodies located near the
scapula or upper thorax, but they insert and act on the humerus.
floor, face down, legs together, hands on floor under shoulder with
fingers pointing straight ahead.
off floor by extending arm, so that weight rests on hands and toes.
body until chest touches floor.
should be kept straight, buttocks should not be raised. Abdomen
should not sag.