CONOR McGREGOR has piled on a massive two and a half STONE in muscle thanks to a special fitness and diet regime.
The Irishman revealed he weighed 190lb, or 13st 5lb, after hitting the weights while recovering from his horror leg break.
That is amazingly almost two-and-a-half stone heavier than the 11st 1lb he weighed in before facing Dustin Poirier at lightweight in July.
Spanish outlet AS spoke with personal trainer Alejandro Celdran to break down McGregor's methods.
Alejandro says hypertrophy training - which helps increase muscle size - becomes a priority.
And he advises that volume is more important than frequency, doing a minimum of four weekly sessions for each muscle group.
It would range between six and 15 repetitions and training should be 80 per cent dedicated to bilateral multi-joint exercises.
Alejandro claims McGregor may prioritise free weights over machines, also trying to do supersets, doing different exercises without rest between sets.
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For McGregor's diet, it consists of six meals a day, eating foods like chicken, fish, beef and eggs, measuring fat and carbohydrates.
Breakfast can be cereals with eggs and sauteed vegetables. Then, for a morning snack, fruit and a salad with honey is an option.
McGregor's main meal includes chicken breast with rice and asparagus and afterwards a vanilla shake with peanut butter and walnuts will be his snack.
Another dinner is McGregor's favourite Irish lamb stew with potatoes, finishing with a chocolate shake with organic tea.
McGregor has only just started hitting the pads again after having surgery and focussing on increasing his strength.
And he is now so big his head trainer John Kavanagh recently joked he could fight at middleweight, with the pair soon to reunite again.
McGregor, 33, first returned in January and was knocked out in a rematch with Porier, 32, who he had beaten in 2014.
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But in the trilogy bout seven months later, he suffered further misery after breaking his tibia seconds before the end of round one.
Having had successful surgery soon after, McGregor is eyeing a return next year.
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