"It isn't exactly my favourite thing," the 1.91m tall swimmer, who weighs 86kg, told the Times newspaper on Friday. "I'm not built to run."
Peaty, who is due to become a father in September, was left high and dry after his regular full-sized training pool at Loughborough University was closed five weeks ago.
"It makes a big difference to be in water," said Peaty, who can swim in the pool with tethers against a current. "I can practise my technique just as I can in a big pool and I work on buoyancy and getting high out of the water.
"I'm in there for an hour a day seven days a week until we can get back to our pool.
"I'm just feeling the water and building that base up. It's a bit like back to square one."