This whole video is basassery and motivation writ large...but it's the guys from Team X-T.R.E.M.E. that put it in perspective.
These guys and gals symbolize everything there is to say about endurance.
Mad Duo Clear
About the Authors: Richard “Swingin’ Dick” Kilgore and Jake “Slim” Call are the HMFICs at Breach-Bang-Clear (www.BreachBangClear.com). They write for current and former military, LEOs, contractors and trained and educated responsible armed citizens. They are the most door-kickingest, trigger-pullingest action figures in the tactical operator tactically operational world. Subscribe to them and stay informed about TTPs, new kit, and latest in what's stoopid (and occasionally inspiring) in the military and modern society or check them out on Facebook.