circa 1965:  An elderly man exercising in Joe Pilates gym on a machine involving bars and pulleys which are 'tensed' by the exerciser against the pull of springs.  (Photo by Susan Schiff Faludi/Three Lions/Getty Images)

” …each muscle may cooperatively and loyally aid in the uniform development of all our muscles. Developing minor muscles naturally help to strengthen major muscles.”

Joe Pilates

I liked the idea of our muscles being loyal to each other.