Callisthenics used in a sentence

Callisthenics in a sentence as a noun

Think of it as callisthenics for problem solving type of research!

Source?Anyways I've run marathons in the past, but I mostly do strength training now, actually mostly callisthenics.

I also do a mix of weighted exercise, callisthenics, and cardio, and I've found the combination to work very well.

Not to mention that you can get a lot of callisthenics in during a 5 minute break every couple of hours at work; just wear comfortable clothes and don't be afraid to use the floor space by your desk.