The authorized crew for a Chaparral crew was 5 soldiers. Rarely did we have 5 man squads, usually it was 4, and sometimes 3. Fortunately, women were barred from short range air defense units, as the primary mission was with infantry and armor divisions.
Yeah, the average Abrams tank round weighs a little over 40 lbs and has to be handled at arms length in confined quarters dynamically, moving at high speed on rough terrain. Most people could not do that without great upper body strength.
I'm so effing sick of this crap. People don't usually make the mistake of asking me more than once why I stay out on the farm and seldom go to town. Even my wife has caught on that it makes me dangerous, mostly to myself.