Tyrone Nurse fights in the Light-welterweight division, which has a limit of 10st (that is 63.5kg).
In a typical build-up to a title fight like the one coming up at Leeds Arena against Hull's Tommy Coyle, Nurse will lose around 3lb a week with a strict training and diet combo.
He plans to be on the 10st 4lb mark and then drop to the final weight on the final day.
His diet includes flaxseeds, for all sorts of nutritional benefits, and scrambled egg whites!
Egg yolks are not allowed, but meat, vegetables and rice figure highly in the routine.
He's allowed recovery shakes and fruit after his tough pre-fight workouts.
Read on, and imagine how you might deal with a champion boxer's diet!