From the back, she was all Parisian: messy blond hair, cap-sleeved white T-shirt under a scoop-back baby-doll dress, chunky platform sandals paired with ankle socks, and a powder-blue Versace satchel.

But instead of lighting a cigarette, she was carefully contemplating which 100-percent organic, plant-based, gluten-free, unpasteurized, zero-additive snack to order.

These days in Paris, wellness and cleansing is the new wine and cheese.

Leaving one's hotel or Airbnb wearing sneakers — whether for a picturesque run along the quai or to spend hours at the Louvre — is finally a la mode, and vegetarians no longer have to go hungry while their carnivore friends eat foie gras and tete de veau.

Nowhere is this change more evident than at Wild & the Moon, a veggie-pushing haven in the Marais and the setting of the aforementioned scene. Tables are wooden. Lightbulbs hang from the ceiling. Ferns drape over ceramic pots. Reggae plays softly, interrupted only by the occasional rumbling of the blender making spirulina smoothies.

Opened in February 2016, it quickly became the place for the healthy hipster set — French and otherwise — to detox on juice, socialize among friends, and "thrive on love and energize in sun rays," as its website says.

"That French paradox of the Parisian girl who dresses all in black, eats everything, drinks, smokes, and doesn't exercise; that can be true of a few girls, but not for most of us," says Victoire Louapre, an expat Parisian who writes about food in California. "Before, we were frowned upon if we went to the gym every day or practiced yoga and meditation."

Now, even hotels are making it their business to offer more than a basic fitness center with a few treadmills for guests and locals.

On a recent Monday around 7 p.m., I was the only non-French adventurer sliding my hands into boxing gloves in the lower level of Hotel Parister, which opened in October in the Ninth arrondissement. The words Mind, Body, Soul loom large on a wall at the far end of the cavernous room where CYD (Conquer Your Day), a grass-roots fitness phenomenon that started as a Facebook group, is heading the workout program, which is open to both locals and hotel guests. About six classes are offered daily, including yoga, core strengthening, swimming, and trigger point, a DIY targeted muscle massage.

"We believe in the benefits of practicing wellness on a regular basis," says Grégory Mollet-Viéville, cofounder of CYD, who credits this increased interest in bien-être (well-being) to generational changes. "I'm 45, [and come from a time where] our parents told us to make some money. Today, I have two daughters, and I'd say, 'Be happy,' which is very different."

Romain Rainaut, his business partner, adds: "You can take care of yourself without restricting yourself. The French don't want to be told to stop doing something, but to change or add something — that can be OK."

In The New Paris: The People, Places and Ideas Fueling a Movement, published in April, author and journalist Lindsey Tramuta writes: "You can't change their almost genetic predisposition to carbing, but Parisians are open to new things once they see they can be done well. The difference between the way in which Parisians now approach veggie-centric diets and the way most Americans do is that they come from an intrinsically more balanced background with food. It's less radical (cut out everything!), more sound (give it a try; learn something new)."

Before Kristen Beddard, author of Bonjour Kale, reintroduced the farrmers of France to the forgotten cabbage — which has become so globally popular it is now featured in chip form at the international sandwich shop Pret a Manger — they considered it a war food or something they'd feed their livestock. But as a result of Beddarad's efforts, the French started to appreciate the idea of making something old new again. For the first time in decades chou kale, as it's affectionately known in France, appears on "eat smart" menus all around Paris — from Green House in the 11th arrondissement to the aptly named Miss Kale in the Second.

"People are finally understanding that health is linked to what you eat," says Emma Sawko, owner of Wild & the Moon, which opened its third standalone outpost near the Palais Garnier in November. "This is pretty new here in Paris. Eating a lot of cheese and good wine is sort of our culture, but now we're all more informed. If I would've opened four or six years before, I'm not sure it would've worked the same way."

Julie Aubert, one of two 30-year-old cofounders of the year-old workout studio-cafe hybrid Chez Simone, also feels she is in the forefront of a movement in which the French are following what the Americans, British, and Australians have known for years: Athleticism paired with avocado whole-grain toast with a side salad of chou kale and maybe a detoxifying cold-pressed juice, is trés trendy.

After my hour-long California barre class in the light-filled studio, I retreated to the locker room where, post-shower, I accidentally moisturized my body with makeup remover. I suppose I was just shocked that either one was available for free use — and from a chic brand like Fresh, no less. Once I was properly primped, I gathered around the juice bar with fellow exercisers to discuss the merits of energy balls, which the house sells for one euro a pop.

"We're slow learners," says Aubert, "because we have a very rich culture related to food and are therefore more reluctant to open our minds, but it's coming slowly."

And perhaps literally, with Paris' first Bar a Meditation, a center-your-chakras center that opened last year to offer group and individual sessions. Unfortunately, I arrived a half-hour late for the afternoon group class and didn't feel up to the challenge of tuning out solo on a cushioned black ottoman in the basement, which is open all day for drop-ins. The bar's location near department stores Galeries Lafayette and Printemps on the Right Bank, however, make it a perfect place for a pre- or post-shopping breather, so I'll definitely go back.

"There has always been an appreciation for a life balance in France," says yoga teacher Cole Zaccaria, a New Yorker who now teaches in Paris with CYD at Hotel Parister, "and we are now entering a time where this includes moments of staying present, slowing down, and being mindful."

And maybe finding the City of Light within.

Where to stay

Hotel Parister
19 Rue Saulnier
This centrally located 45-room hotel in the Ninth arrondissement was designed with the epicurean in mind. From the underground fitness center sauna and pool to the tasteful room decorations (think navy ombre walls and pink velvet pillows) to the  inviting lobby, bar, and restaurant, it's a communal hub for the cool and curious. Rooms from about $300.

Where to eat

Wild & the Moon
55 Rue Charlot
The fashion set descends on this light-filled cafe for all-natural food and drinks, such as the "Better Than Botox" cold press for about $6 and the spouted buckwheat granola for about $11.50.
Green House
22 Rue Crespin du Gast
This produce-focused establishment in the 11th arrondissement comes from Californian Kristin Frederick of Le Camion qui fume fame. Outside, herbs flourish in flower boxes; inside, dishes such as arepas are topped with avocado, and the iced black tea is infused with thyme and vanilla. Starters from about $6, mains from about $13.
Miss Kale
104 Rue Reaumur
There's more than just the obvious as this spot in the Second arrondissement, but the idea is still fresh and healthful. Case in point: the green bagel (poppy seed, really) with salmon for about $14, and the healthy bowl with tricolor rice and heaps of veggies for about $12.

What to do

Bar a Meditation
5 Rue Gaillon
Take time out to go within at this tri-level space for mindful meditation, where half-hour sessions start at about $23. The two rooms, which are decorated in neutral tones with wooden accents, are spacious and calming.
Chez Simone
140 Rue de Rivoli
Upon climbin the staircase and entering this multiroom fitness center, cafe, and lounge, you'll feel right at home — and that's the point. "It's an upgraded version of your house," cofounder Julie Aubert says  of the space that's decked out in tropical wallpaper and outfitted with ocean-blue yoga mats from Adidas. Classes start at about $23,  fresh juices and smoothies range from about $5 to $8, and an acai or matcha energy bowl costs about $8.