The latissimus dorsi, the large triangular muscles that extend from under the shoulders down to the small of the back on both sides. These are the largest muscles of the upper body.
Basic Function: To pull the shoulders downward and to the back.
The spinal erectors, several muscles in the lower back that guard the nerve channels and help keep the spine erect. They are also the slowest muscles in the body to recuperate from heavy exercise.
Basic Function: To hold the spine erect.
Exercises coming soon...
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