Berahino has gotten rid of nearly a stone since joining Stoke and has promised coach Mark Hughes he will have only one week off this summer as he tries to regain his form.
For the 25th consecutive Premier League game, Berahino failed to hit the net in the Potters’ 0-0 draw with West Ham on Saturday – a drought that goes back to February 2016 when he was still with West Brom.
His turbulant spell there was ended by Stoke’s £12million contract in January, yet the 23-year-old who was ostracised at The Hawthorns, has had to fight back to fitness, dropping around six kilograms from what he weighed with the Baggies when he was sent to France for a conditioning programme having been classified unfit.
“I’ve lost about six kilograms, six or seven,” Berahino said.
“It’s been very easy for me to shift that weight. The way my body is, when I’m playing, I trim down. When I’m not playing, I put on weight. I’ve got to blame my family for the genes they gave me.
“It’s just that I put on weight easily if I don’t move. If I don’t do exercise, my weight just goes up. That’s what happened at West Brom.”
With only three top-flight matches left this season, Berahino will not have many more opportunities to play before the summer, yet he has raised fears he could soon be out of shape again by vowing to embark on a lengthy pre-season programme.
“It’s difficult when you’re not involved,” Potters boss Hughes added of Berahino.
“We know the circumstances at West Brom. He’s benefited from Premier League training day in, day out. He’s in a better place physically and mentally.
“Clearly, he’s playing games and enjoying it. There’s more to come from him. It will take time. He’s looking forward to next year – he’s telling me he’s going to have a week off and that’s it, he’s going to work all summer – that shows the attitude.
“It doesn’t surprise me. We’ve been really pleased with him. He’s trying to get back to what we know he’s capable of. He’s not there now and it’s frustrating for him. It plays on his mind – he wants to get off the mark. It’d be nice to get him on scoresheet before the end of the season – that would be perfect.”
While Hughes has been pleased with Berahino’s dedication to getting back in shape, Hammers boss, Slaven Bilic has been disappointingly unsuccessful by his own striker Andy Carroll’s injury problems.
The 28-year-old has been reduced to just 15 Premier League starts this season and a groin injury hindered him of not playing at the bet365 Stadium.
However, his manager wants him to designate his fitness for Friday’s clash with Tottenham, when the Hammers could confirm their safety and seriously dashed their rivals’ title bid.
“I don’t like to moan but I would be very disappointed if he is not involved in our next game,” Bilic said.
“You don’t have to play 90 minutes but if he is on the bench it gives you a lift because we are lacking that power at the moment. We will talk about (his injuries) after the season.
“It is not his way of life or that he is not professional. As far as I know he is very settled, he is very up for training. It looked at one stage of the season that he was okay. It was no coincidence that in that period we won six of nine. And then suddenly you are without him…”