UFC lightweight champion Khabib Nurmagomedov is renowned in the UFC world for his impeccable cardio inside the Octagon, and recent footage shows how he manages to keep in such great shape.
A video posted online shows the 155lb star swimming a front crawl against the current in strong, icy-cold rapids in a river in Kizilyurt, as part of his training for the next title fight.
One user joked on Twitter: "Plot twist... he was drowning a bear that stole his fish."
This isn't the first time that Khabib has been found training in such an unorthodox way, previously being publicly criticised by animal rights group PETA for cruel treatment of animals after videos surfaced of Khabib wrestling a muzzled bear which was chained to the ground.
He's also known to hold his breathe underwater for an impressive amount of time, so we shouldn't be surprised to see him swimming against currents in freezing water.
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As of yet, Khabib, who is currently 28-0, does not have a scheduled opponent for his next fight, but it is widely rumoured that he will face top contender Tony Ferguson for a future title defense.
This wouldn't be the first time the two have looked to clash, however, as a fight between Khabib and Ferguson has been scheduled four times previously, but each of them have been cancelled for various reasons related to injuries and bad weight cuts.
Ferguson, who sports a very impressive 18-1 record in the last decade, is generally considered to be Nurmagomedov's toughest competitor, and it might just all be down to the similarly odd methods of training that he uses when compared to Khabib.
The American star frequently posts unusual training videos to his social media which include him dancing before training, as well as previously repeatedly kicking a steel bar so that he could "toughen up" his shins.
Perhaps a match-up between the two individuals could decide once and for all, whose training regime works the best.
Here's to hoping that such a fight can happen very soon.News Now - Sport News