'Bachelorette' alums Kaitlyn Bristowe and Shawn Booth talk fitness, birthday fails and taking things slow

What's the secret to Shawn Booth and Kaitlyn Bristowe's super-fit physiques? Pizza.

Okay, not exactly. But the "Bachelorette" alums, who found love on season 11 in 2015, know the importance of taking much-deserved breaks from demanding diet and exercise schedules. While Kaitlyn doesn't take her workout regime quite as seriously as Shawn -- "I really do not like going to the gym," she flat-out admitted -- her fiance, a personal trainer, isn't opposed to Kaitlyn's Sunday pizza dinners.

"I'm a big fan of cheat meals. I give myself one to two cheat meals a week," Shawn told AOL Entertainment. If you're thinking that your cheat meal cadence is more like five to six times a week, don't feel too bad: Shawn is on a particularly strict regimen as he trains for IRONMAN Lake Placid this July.

"It's super intense right now," Shawn said, adding that it's often painful to get out of bed because his body is so sore. "I try to get [Kaitlyn] to give me massages, but today she just booked one for me, so we had a massage therapist come to the house. So I got a nice deep-tissue massage."

The professional massage was in part a birthday present, as Shawn and Kaitlyn spoke to AOL Entertainment on Shawn's 31st birthday -- although hours earlier, Kaitlyn mistakenly bought him giant "32" balloons.

"I went to Party City and I was thinking about what age I was turning!" Kaitlyn explained, laughing. They both shared photos of the unfortunate mixup: "When my fiancé woke me up this morning and said "Happy Birthday! Do you feel 32?!" I thought she was joking," Shawn wrote. For her part, Kaitlyn captioned the photo, "Fiancé fail."

Doodle is just as confused as Shawn. Turns out he's 31. Fiancé fail. Happy Birthday Shawn B. #Whoops

A post shared by Kaitlyn Bristowe (@kaitlynbristowe) on

Shawn and Kaitlyn recently celebrated what they affectionately call the "longest engagement ever," but they're not complaining: "We're just trying to do it the right way, if there is a right way," Shawn said. "Being on TV and getting engaged after barely knowing somebody isn't really ideal. Once we got off the show we just wanted to take our time to get to know each other before we take that next step."

Added Kaitlyn, "I don't really feel like much has changed [between us] except for the fact that we get more comfortable with each other. Now it's a normal relationship where I'm like, 'Okay, can we spend more quality time together? You're at the gym twice a day and then you want to sleep.'"

For these two, there's just hardly enough time in the day: Kaitlyn is busy with her new podcast, Off the Vine, and Shawn teamed up with personal trainer Erin Oprea to found CitySTRONG, which hosts large group workouts across the country and contributes proceeds to different charities.

21 PHOTOS
Kaitlyn Bristowe and Shawn Booth
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Kaitlyn Bristowe and Shawn Booth
I'm not sure I'll ever stop posting pics of this dress. Do you think they have it in white? 👰🏻
Welcome to the jungle, bitches. #TheBoothstowes
The Boothstowes 💕 @goldmorning
I was hoping for Olive Garden but this place was pretty good too. #OG
Happy Birthday Tucker Doodle!! You may be 9 but you look and act like a little 2 year old pup and I love it. (And yes he will see this post, he has Instagram) so everyone wish @tuckerdoodledog a happy birthday!
Olive juice 🍸(I guess I could have fixed my red eye but meh)
Catch these kids talking about babies tomorrow @ 8am ET on @goodmorningamerica @ovaeggfreezing #ovaeggfreezing
So I was going to caption this pic "Starbucks lovers," but when I went to google the lyrics for Taylor Swifts blank space song, I quickly realized that those are NOT the right lyrics. I also realized that this is really old news. Anyways. Starbucks lovers.
Voting Booth
Hi 👋🏼 I wanna have your babies. That is all. @omnihotels @brettonwoodsnh
I love him so much. Even when I wanna throat chop him, I still love him so friggen much. Happy Valentine's Day 💕
What the kids call, a throw back. 💕
Who ran a marathon, and who crushed ciders? You decide.
GIVEAWAY | For those of you who'll be home this Christmas (if only in your dreams), I have a surprise for you! My Google Pixel phone from Best Buy Mobile is a lifesaver and keeps me so connected with my fam and friends around the world. I'm giving one away to a lucky fan. Please comment who you'd love to video chat with this holiday season. Contest ends at midnight. Good luck! @bestbuycanada 📸: @jasmine_archie
Everyday you make me realize just how lazy I really am 💕
Why am I smiling like I have braces? Such a fun winter wedding celebration last night! (Dress is @shopaliandjay)
Solid weekend for the kids ✌🏼️Thanks to the @hardrocksd for having us at your bad ass hotel! #werewiththeband #MOvember #citystrong 📸 Jerod Harris @gettyimages
Get a room. #throwbacksunday ??
Thankful for these 2 boys in my life. Happy Canadian thanks giving weekend to all my little canucks. Shawn better be cooking me a turkey tomorrow!
Since everyone was getting their panties In a knot over my hand placement, (totally reasonable you guys 🙄) we have decided to share some really exciting news. SHAWN B IS WITH CHILD. Baby Boothstowe is due April 1st 2017. We can't wait to meet him or her!!! #whothefcareswheremyhandsare
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