While currently being put seriously through his paces ahead of the forthcoming season, Gus still remembers vividly pre-season days back in his homeland.
"I've always said that the ones I did while at River Plate in Uruguay were the worst - they were really hard," recalled Gus, who admitted that the training was so hard it even bought about the occasional mood swing.
"We were running on the beach, going up and down in the sand and running in the water. It was the kind of training that, I remember going back to my house and if the food was not ready or something was not good, I got upset with everybody. Not because of that I got upset, I was just so tired.
"You know you've got to run, you know you've got to suffer but, at the same time, you know that you need to do this."
He does acknowledge, however, that these days it is less sufferance and more science when it comes to pre-season preparations.
"Yes, that is for sure. There are a lot of tests and they know how long we've got to run in distance and time. Also, sometimes, they look at people with a few years behind them and take that into consideration. So in some ways it is easier.
"When you are older you know how to control yourself better - when you are young you tend to run for fun.
"It has been good though. We are training well and I think we are training more than last year. It looks like we are going to be fitter so that is going to be good."
Gus Poyet maintains that the toughest pre-season training he has encountered was back on the beach in his native Uruguay.