Molly Sims in Bathing Suit Has "Birthday Week"

Molly Sims is celebrating her birthday–in her bathing suit of course! The supermodel, who turned 49 on May 25, is currently vacationing in Saint-Tropez with husband Scott Stuber and living it up. This week, she shared a bunch of photos of herself, showing off her forever young figure in a salmon colored swimsuit. “Birthday week continues,” she captioned one of the images shared to her Instagram Stories, also adding a gallery. “Birthday behavior still going strong,” she wrote. How does she make 49 look like 29? Read on to learn 10 of Molly Sims’ top do’s and don’ts for staying in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. Don’t Diet

If you want a body like Molly, it doesn’t require starvation or drastic diets. “It's more about living healthy and how you're feeling," she told Women's Health. "I truly, truly don't like the word 'diet.' I don't even like the scale. I use a pair of jeans; the jeans don't lie I can tell you that."

2. Do Make a Commitment

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One thing it does require? A commitment to fitness and a healthy way of eating. "This does not come naturally," she told Shape. "I have to work out 60 to 90 minutes at least five days a week and stick to a high- fiber, low-calorie eating plan."

3. Do HIIT Workouts

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Molly does HIIT-style workouts, which she claims is very effective for her body after doing years of intense cardio. “I used to be that girl who wouldn’t pick up the 2-lb weights at SoulCycle with the fear that I’d bulk. That mentality has shifted drastically,” she wrote on her blog.

4. Don’t Spend Hours Working Out

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How long do Molly’s workouts take? Sometimes just 20 minutes. "On good days, workout. On bad days, workout harder,” she captioned it. “Today’s circuit is what I do when I just have 20 minutes with @lauralizkeller [Sims' personal trainer] to get it in and still break a sweat!” Her workout is pretty simple, involving 45 second intervals of the following, with the entire set repeated two to three times: jumping jacks, modified pushups, tricep dips, squat jumps, leg raises, burpees, ab lateral bend and hold. Here’s the catch: She uses ankle and wrist weights the entire time.

5. Do Intermittent Fasting

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Molly is one of the many stars who swear by intermittent fasting. Her first meal, usually a smoothie with blueberries, almond milk, Vital Proteins protein, and greens, is consumed at noon. She finishes her last meal of the day by 7 p.m.

6. Don’t Consume Sugar

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Molly tries to avoid sugar altogether. Instead, she loads up on mostly veggies, lean proteins, and fruits. "I tend to stay away from anything super sugary, like orange juice grapefruit juice, because it really spikes me," she told Women’s Health. "I try to stay away from dried fruits; it's ultimately full of sugar.”

7. Don’t Eat Gluten

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While Molly isn’t gluten-free, she doesn’t consume a lot of it. "It's not that I'm celiac; I just feel better when I have less of it," she told Women’s Health. "I don't care if I'm being rude to the rest of the table," she added to Shape, revealing that she always orders a salad first thing after sitting down at a table to keep herself from snacking on carbs. Then I'm not tempted to reach for that bread."

8. Do Load Up on Healthy Fats

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Molly encourages the consumption of healthy fats. “I would have never eaten an avocado 10 years ago if you paid me,” she told Health. “Like, are you joking? But now, instead of binging [and] not eating all day, eat it and then you won't binge.”

9. Do Reward Yourself

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One way Molly keeps herself motivated to reach her health goals is by giving herself rewards. For example, she will set a goal like “I'm going to get up every morning at 6:30 to work out," she told Shape. "Then, when I've kept with it all week, I give myself something I really want, like a new handbag or a piece of jewelry I'm coveting."

10. Don’t Exercise Alone

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Molly encourages enlisting the help of a loved one as a fitness buddy. "My mom was on my daddy to exercise all the time," she told Shape. "She was like, ‘Listen buddy, if I'm doing this, you're doing it too.' and I agree!" Her workout buddy? Her husband, Scott Stuber, who she often coordinates sweat sessions with to keep each other accountable.