To get a lean look, many men are working out in a room full of women doing The Bar Method.
The workout is not new. It was developed by a dancer in the 1950's, but recently men started to show up at classes.
Maika Manrin, co-owner of The Bar Method in downtown Seattle, says she now notices an increase in the number of men taking her classes.
"Well they're walking by and they see a class full of beautiful women working out, they want to know what's going on in here,” said Manrin. “So the smart ones come here."
Tri-athlete Clint Patterson takes the class.
"There are moments during the workout when I'm like, I want to stop,” said Patterson.
That's saying something. Patterson has completed five Ironman triathlons. He says because of The Bar Method, he's stronger now at 42 than he was at 22.
"I feel like I’m in the best shape I’ve been in my life,” he said. “I’m faster than I’ve been before. I’m faster running. I’m faster on the bike."
The Bar Method co-owner Bev Currier says it gets men flexible, too.
"A lot of men that come in here. It’s like, ask them to touch their toes, they can't touch them,” she said. “It's a one hour workout. They can get the strength and the flexibility in one hour."
With weights, a ballet bar and balls, it's a workout that can make a grown man wince.
And Patterson agrees. "It's tough."