Burk, a veteran who said he's currently stationed at Fort Stewart in Georgia, told BuzzFeed News he made the video after seeing scores of people on his page making "flat out excuses" for why they couldn't exercise.

"The soft and tender-hearted approach works for some," he said, "but after having trained soldiers for over 12 years now, I know what works best: blunt, in-your-face truth that slaps you so hard that it forces you to step back and start self-analyzing to see if there's any validity in what you've just been told."