And then try it on a treadmill, and then (over at LEAST a few days) SLOWLY increase the speed and incline, do it in FIRE BOOTS, and turn 90° every 15 seconds (L x 4 for the first minute, R x 4 the next).

I've done it, and it's not fun. 😎
#FirefighterFunctionalFitness
#FirefighterFunctionalFitness