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.
Strengthening the adduction muscles provides stability to the shoulder joint. Photo Credit gpointstudio/iStock/Getty Images. While you may not give it much thought, the muscles that bring your arm in towards your body are actually quite important. This movement, known as adduction, uses the muscles that make activities like throwing a ball or swinging a tennis racket possible. They also play a vital role in stabilizing your shoulder joint.