Cocaine normally stays in the system for approximately 48 hours. Although the method of administration and the dose administered affects how long it takes for the body to metabolize this drug. When coca leaves are chewed, absorption time is around 30 minutes.
The muscles that provide the movement for the shoulder and upper arm include the anterior muscles in the front, the posterior muscles in the back, and the shoulder muscles that are sort of in between. Pectoralis major: This muscle has two heads, or sections of muscle tissue, and covers much of the front of the thoracic cage.
Below the infraspinatus is the teres minor, and below the teres minor is the teres major. Both the teres minor and teres major commence on the shoulder blade and stretch out to the upper arm bone. Together these three muscles assist the latissimus dorsi in shoulders adduction during the pull up. This is the action that moves your upper arm bone into your body, lifting your body up to the bar.