Every basic training company at Ft Benning had at least one sawdust pit where drill sergeants invited the clumsy or slow learners or just plain stupid recruits for some additional PT - generally things like a dying cockroach just to make sure the sawdust went down the shirt and found sweaty skin to irritate. And drill sergeants loved to run and quick march - of course, they did it on the crown of a dirt road, and recruits got to keep up in the sand filled ruts. Good ole character building days. One of the best tools Drill Sergeants had at their disposal that probably still exists today is punishing the whole group for an individual's infraction - peer counseling/correction is pretty effective in just about any circumstance.