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.
Back Muscles. Nearly every muscle in your back is used on gymnastics rings. The large latissimus dorsi muscle is the prime mover of arm extension and is a powerful arm adductor. When reaching for the rings overhead, this muscle is used to pull the rest of your body upward and forward.