Boxer Floyd Mayweather and UFC lightweight champion Conor McGregor are the elite of the elite in their respective sports, and they know better than anyone reading a blog post on the internet how to get ready for a fight.

The men will fight in a 12-round, non-title boxing match on Aug. 26 in Las Vegas in what has a chance to become the highest-grossing fight in the sport’s history.

The hype has already been off the charts, and it’s going to amp up with each week that passes. The reason the fight is so big, in addition to how good they are as fighters and the unique nature of a boxer going against a mixed martial artist, is that they’re both great promoters.

On Thursday, each man released training footage on Instagram. It’s not sparring video – no one will ever see that, unless it’s bogus sparring intended to deceive or as a joke – because that is something that every fighter is adamant about: No online video of live sparring.

But the videos do provide a path into their preparations and how they want the public to view them before their showdown.

The first video is of Mayweather hitting a bag. Make of it what you will, but he sure doesn’t look like a 40-year-old man. His speed and reflexes seem impeccable.

The video below is from McGregor’s training, which is primarily hitting a heavy bag. You can hear him at the beginning say, “I’m going to stop Floyd,” and later, “I am boxing!”

Interestingly, McGregor wrote on his post, “You’ve never seen these moves.”

So that is our first look at Mayweather and McGregor preparing for their mega-fight.

Did anything you saw change your mind about what the outcome will be? Was there anything that surprised you? Do you think McGregor looks comfortable with boxing gloves on?

Let us know in the comments and stay tuned to Yahoo Sports for much more on the Mayweather-McGregor bout.