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.
The Air Force has 10 major commands. and two Air Reserve Components. (Air. Force Reserve Command is both a. majcom and an ARC.) As major subdivi-. sions of the Air Force, majcoms conduct. a major part of the serviceâs mission and. are directly subordinate to Hq. USAF. Major commands are organized on. a functional basis in the US and on a.