Health

These sexy Sirens reveal how they got strip club-worthy bodies

The stage at Sapphire 39, a gentlemen’s club that opened in Midtown in December, isn’t solely reserved for the steamy pole-dancing routines of its nubile strippers.

Twice each Friday night, the Sirens of Sapphire step into the spotlight for a thrilling, clothes-on song-and-dance show. These six singers, actresses and dancers spend 45 minutes trotting the stage, working the crowd and belting out today’s pop-music hits, sometimes alongside topless strippers. It’s a high-octane display of endurance and grace, which they seem to breeze through without a drop of sweat.

So how do the Sirens stay on top of their game? Here’s a look at the workout and diet routines that keep them at their best.

Working out — for a song!

Tamara Beckwith

“It’s very physical,” says Jamie Hartmann of singing onstage. “You need deep breaths — you need to sustain a note while jumping up and down.”

That’s why this 28-year-old bombshell dedicates 30 minutes to high-intensity full-body plyometrics five times weekly: Think burpees with a pushup, followed by a jump and a squat, all done in her Astoria apartment.

“If you’re a working performer, you have to stay consistent with some kind of exercise routine,” she says.

Hartmann, who previously kickboxed at a UFC Gym (and lost 30 pounds doing it), also attributes her great shape and onstage energy to a mindful diet. Gluten-, dairy- and soy-free, she’ll grab a Vega bar after a workout, then continue the day with proteins and veggies.

That doesn’t mean splurges don’t happen. “Kettle Brand jalapeño chips are the greatest,” she says. “It makes me angry how good they are!”

She raps while working out

Tamara Beckwith

Victoria Dehel dips into her roommates’ stash when she has junk-food cravings, but the 23-year-old Astoria resident generally sticks to proteins, veggies and carbs, such as wraps stuffed with spinach and eggs, in the morning. At night, it’s salmon and broccoli.

“It’s important to make sure you eat real fuel foods,” she says.

She also hits the treadmill for high-intensity cardio five times a week, for about 60 to 90 minutes each time — while rapping aloud.

“[We perform] 45-minute sets, and we have to prepare for two of them — the treadmill . . . sets you up for that.”

Waiting to exhale

Tamara Beckwith

Kelsey Madsen — a singer/dancer who has previously performed aboard cruise ships — attributes her toned body to good genes, but the 26-year-old Hamilton Heights resident also practices yoga as often as she can at Yoga to the People. She finds the discipline’s breath work beneficial for performances.

“When you’re dancing, you often breathe [high in your chest], and when you’re singing, you’re supposed to breathe low,” she explains. “I find yoga . . . helpful in finding that balance.”

The redhead has a healthy diet to match: Breakfast can consist of eggs with spinach; for lunch, she eats Greek yogurt with jam.

Her weakness? Greasy food: “I like to have french fries before I sing.”

Weight Watching wonder

Tamara Beckwith

“When you’re surrounded by beautiful women, you want to stick out,” says performer Christina Rinaldo, 25. She keeps active through rehearsals three times per week. “It’s a 45-minute workout . . . singing, dancing, breathing,” she adds.

But the Astoria resident says the real secret to her looks is Weight Watchers, which she started in April: “The weight just came off — 25 pounds.”

If she stays within her points quota, she can eat how she likes — she sneaks in a bagel once a week — but it has given her healthier habits, such as eating chickpea patties for dinner.

‘My cleanse changed my life’

Tamara Beckwith

Until she was 25, singer Joie Giordano could devour entire pizza pies and stay rail-thin. As she got older, her weight began creeping up, and by age 29 she noticed a difference.

“I had to put myself in check,” says Giordano, now 30, when she realized she had hit the 165-pound mark. “I was the heaviest I ever was.”

So last winter, she went on a 10-day Purium vegan cleanse, which focuses on superfoods and proteins.

“I’ve never felt so good in my life,” adds the Astoria resident.

The program taught the slender blonde to eat her favorite foods in healthier ways, and she’s since brought her weight down to 139 pounds. Although she still falls victim to the occasional pint of Ben & Jerry’s, she’s found better ways to enjoy her favorite comfort foods.

“I’m Italian — I can’t live without my pasta,” she says. “But I can have zucchini linguine — and then I take ground turkey and I’ll make meatballs.”

She’s a dance machine

Tamara Beckwith

Sholanty Taylor prefers cardio over weights.

“I like things to look firm but not masculine,” says the 25-year-old. So when it’s warm, she runs outside three times a week near her Kew Gardens home.

“I also sing [while running] on the track . . . to know where to breathe [when performing],” she adds.

In the frigid months, she relies on rehearsals and performances, occasionally heading to Zumba class at Broadway Dance Center.

“The movements are very loose,” she says.

Dietwise, she avoids red meat, and if she wants a treat she’ll head to Roast Kitchen for chicken with rice, quinoa, kale or spinach.

“You’re getting that protein you need,” she says.