Proper posture starts with a good understanding of the muscles that are involved in posture. Several different muscles are responsible for maintaining upright posture, and over time, poor posture can cause these muscles to lose strength.
Air Force. A major in the Air Force typically has duties as a senior staff officer at the squadron and wing level. In flying squadrons majors are generally flight commanders or assistant directors of operations. In the mission support and maintenance groups majors may occasionally be squadron commanders.
Tactical Level. At the tactical, or the personal/direct level, Air Force members master their primary duty skills. They also develop experiences in applying those skills, and begin to acquire the knowledge and experience that will produce the competencies essential to effective leadership.