‘A Man Without Love’ singer Engelbert Humperdinck credits underwater workout for keeping him ‘alive’ at 90

At 90, Engelbert Humperdinck has an unusual workout routine he credits with keeping him "alive" and going strong.

The British singer, known as the "King of Romance," recently appeared on "The Jim Masters Show," where he shared his unconventional exercise regimen.

"I walk out in the pool all the day," he told the host.

"I do all my martial art moves in the pool underwater, which makes it even more effective. … And that’s how I stay alive and keep going and keep myself as fit as possible so that the audience can see me in a respectable way." JOAN COLLINS SHARES HER SIMPLE SECRETS TO AGING GRACEFULLY AT 93 "That's where I work out there in the pool," he said.

"I do all my stuff up there, which is great." And it appears to be working.

The "Release Me" singer is still performing regularly, with concert dates scheduled into 2027 abroad.

He's also preparing to release a new album , "Faithfully," on Aug.

28.

The album features Humperdinck putting his own spin on songs by Journey, the Cars, KISS and Aerosmith, with several guest musicians joining him on the record.

While Humperdinck is working to keep his body young, a decades-old song is helping him reach younger audiences.

His 1968 track "A Man Without Love" was featured in two episodes of Marvel Studios' "Moon Knight." "… Since ‘Man Without Love,’ it’s triggered something off," he said.

"And it’s so nice.

It’s so nice to know that people are now not worried about an age.

They’re worried about the music, and that’s all that counts as far as I’m concerned.