The Latissimus Dorsi is one of the largest and broadest muscles in the back that is often activated during normal daily activities. The Lats primarily function to allow adduction, extension, and medial rotation ofthe shoulder assisting with pulling heavy objects off of an overhead shelf, swinging your arms during walking, and crossing your arms across your chest. This muscle can also help assist with pulling your body weight upward, breathing, shoulder depression, sidebending, and extension of the spine resulting in an anterior pelvic tilt. By strengthening the Latissimus Dorsi one can improve both their postural and breathing function as well increase ease with daily activities involving upper extremity use.