You can practice such glides standing: Initiating the movement from
the middle of the rib cage, encourage your rib cage to move side to side, and then your hips to shift from side to side, without disturbing your shoulders and head.
The most external of the core muscles, the rectus abdominis, or RA, runs vertically from
the middle of the rib cage in the front of the body to the pubic bone.
Not exact matches
In fact, the upper fibers need the coordinated assistance
of the
middle and lower fibers in order to elevate the scapula, but even then, they can't do the job without coordinating their work with the work
of the serratus anterior muscle which covers the side
of your
rib cage.
Lengthening the lats and pecs and strengthening the rhomboids and
middle and lower trapezius will restore full range
of motion in the sternum and
rib cage and promote fuller costal breathing.
While the external intercostal muscles are the primary movers
of the
ribs during inhalation, many other muscles assist with
rib cage expansion and sternal elevation, including the rhomboids,
middle and lower trapezius, and serratus anterior (5).