For as long as there have been weight classes in MMA, there has been weight cutting, with athletes attempting to drop as much water weight as possible for weigh-ins so that they are the bigger, stronger man or woman come fight night.
This year there have been a number of horror stories involving extreme weight cuts in the Ultimate Fighting Championship, such as middleweight Uriah Hall who suffered a seizure and a mild heart attack cutting weight, lightweight champion Khabib Nurmagomedov who was rushed to hospital and even former welterweight champion Johny Hendricks whose kidneys failed on him as a result of a weight cut gone wrong.