Conor McGregor has the chance to make history on Saturday night when he faces Eddie Alvarez for the UFC lightweight title at UFC 205.
Not only will he headline the first ever UFC event in New York City, at the world famous Madison Square Garden no less, but he can become the first ever two-weight champion in the company's history.
So how has McGregor trained for his historic showdown? The Notorious One told the UFC in an interview about how suffering a defeat to Nate Diaz at UFC 196 led to change in his regiment.
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McGregor, who has made the programme available to purchase, said: "In the first Diaz fight, I couldn't last two rounds; my lactic acid filled and I couldn't clear it.
"After the contest, I wasn't sure what was going on; I was blaming absolutely everything, so this was the programme I went through.
"It's a cardiovascular-based, scientifically-monitored programme. I learned about over-training; I used to work, work, work and I'd work myself into a brick wall."
However, Mystic Mac has learned how to work smarter and now he is now feeling the benefits all around his body. If there is one thing not to expect on Saturday, it's for McGregor to run out of gas.
"This training monitors the heart rate, and the test results, the lactate test results. I was able to train at certain zones and not over-train, it kept me training and it kept me climbing up and up.
"My body fat is coming down, my VO2 max is coming up; I'm lean, I'm faster and I'm longer on the programme, so now I look forward to showing phase two."
The 28-year-old has had a special nutritionist living by him in Ireland during training and he also reunited with Moldovan wrestling specialist Sergey Pikulskiy, a man he has worked with since he was 16 and helped him overcome Chad Mendes last year.
Having brushed up on his wrestling, McGregor could not resist one final dig at Alvarez before Saturday.
"We got together again and began training and it's been phenomenal, I feel I am going to toy with this man."
So you think McGregor can make history on Saturday? Let us know in the comments below.