The Olympic swimmer has been hard at work in the studio with his pro partner Katya Jones ahead of Saturday night’s show, where they will be performing the quickstep.
But, speaking on ITV's Lorraine, he confessed it was gruelling stuff.
"This is why my feet are hurting so much," he told host Lorraine Kelly.
"Because I've got to change direction so quick and I’m always on my tiptoes, so literally 95kg is going through all my toes. So every day I wake up and I’m like, I can’t walk'.”
“We are nearly there, we are nearly there, it’s coming together,” added Peaty, who appeared on the show with Jones via video.
The pair ended up towards the top of the leaderboard after their first week on the BBC ballroom contest.
But earlier this week Peaty, 26, admitted on Instagram that he was having a really hard time mastering his new dance.
“Yesterday I really struggled and questioned myself why do I do this and why am I doing this, because nothing was clicking,” he shared in a video.
“But for some reason overnight, a bit of rest and a bit of just thinking about it overnight, it's just really really helped."
The star said that he was "in a happy space again", adding: "So I'm enjoying it and hopefully I can relax into it."
Watch: Who is Strictly's Adam Peaty?