The 33-year-old has endured a frustrating campaign to date for the Potters, with surgery on a knee problem ruling him out for a couple of months.
The former Ipswich Town forward did not return to action until a couple of weeks ago but played in Stoke’s last two Premier League matches to prove his fitness for the Republic of Ireland’s upcoming games.
The men in green face Wales in a World Cup qualifier on Friday before taking on Iceland in a friendly on Tuesday, March 28 and, after training with his colleagues on Monday in Abbotstown, Walters admitted that his body is holding up well.
"I’m fresh and ready to go,” he said. "Lots of running around, lots of defensive work, two tough ones but, most importantly, I got through them."
Walters only played in one match at Euro 2016 due to injury but remains philosophical about his recent problems.
"That's part and parcel of being a player," he added. "You have ups and downs. I wasn’t where I wanted to be, but that’s life. I was kitted up sitting on the bench, but couldn’t play in those games."