Saido Berahino is planning to continue his fitness drive throughout the summer

Saido Berahino has shed nearly a stone since joining Stoke and has promised Mark Hughes he will have only one week off this summer as he tries to recapture his form.

For the 25th consecutive Premier League game, Berahino failed to find the net in the Potters' 0-0 draw with West Ham on Saturday - a drought that extends to February 2016 when he was still with West Brom.

His tumultuous spell there was ended by Stoke's £15m acquisition in January yet the 23-year-old, who was ostracised at The Hawthorns, has had to battle 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 deemed 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.

Berahino could not break his Stoke duck on Saturday as West Ham held firm at the Bet365 Stadium

"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 games left this season, Berahino will not have many more opportunities to play before the summer, yet he has assuaged 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.

2:48 Highlights: Stoke 0-0 West Ham Highlights: Stoke 0-0 West Ham

"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."