Major Misty Posey, center, demonstrates proper form for pull-ups to Marines at Marine Corps Base Quantico, Virginia, Feb. 19, 2016. Posey teaches a pull-up class at the James Wesley Marsh Center at MCB Quantico to improve the performance and capabilities of Marines for pull-ups according to Marine Corps fitness standards. Posey is a plans officer for Manpower Integration. - Major Misty Posey, center, demonstrates proper form for pull-ups to Marines at Marine Corps Base Quantico, Virginia, Feb. 19, 2016. Posey teaches a pull-up class at the James Wesley Marsh Center at MCB Quantico to improve the performance and capabilities of Marines for pull-ups according to Marine Corps fitness standards. Posey is a plans officer for Manpower Integration.