Kourtney Kardashian’s Weight Loss: How She Shed the Baby Weight

After the birth of her third son, Kourtney decided to work on her fitness and lose weight. Here is all about Kourtney Kardashian's weight loss journey.

Sanchari Bhattacharya
Written by Sanchari Bhattacharya , Health & Fitness Expert
Updated on Apr 14, 2025 | 05:01 PM IST | 7.7M
kourtney kardashian weight loss
Kourtney Kardashian’s Weight Loss (Image Source: Getty Images)

Post-pregnancy weight gain is normal for every woman. This is why, even though Kourtney Kardashian maintained a moderate weight throughout much of her life, the arrival of her baby brought about a natural weight gain over the months. However, her recent appearance on TikTok and Instagram sparked widespread interest and admiration. Fans couldn't help but notice her remarkably slimmed-down figure, shedding all the post-baby pounds in just a few months.

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Kourtney's journey to reclaiming her pre-pregnancy physique has been both inspiring and well-documented on her show, Keeping Up with the Kardashians. She started working out frequently, managed her sugar cravings, and consumed nutrient-dense meals to get back in shape. Let us take a close look at Kourtney's fitness journey and how she achieved her impressive transformation post-pregnancy.

Who Is Kourtney Kardashian?


Kourtney Kardashian is a well-known television personality, entrepreneur, and social media influencer. She first gained fame as a star of the reality TV show Keeping Up With The Kardashians, which follows the lives of the Kardashian-Jenner family. Born on April 18, 1979, Kourtney is the eldest daughter of Kris Jenner and the late Robert Kardashian. 

Beyond her reality TV career, Kourtney is a successful businesswoman. She co-founded the clothing boutique DASH with her sisters and launched her own lifestyle brand, Poosh, which focuses on health, wellness, and beauty. 

The reality TV star is also a mother to four children: Mason, Penelope, and Reign, whom she had with ex-partner Scott Disick, and recently birth to Rocky Barker, with husband Travis Barker, with whom she shares a long-term relationship. 

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Known for her dedication to fitness and healthy living, Kourtney often shares insights into her lifestyle on social media, inspiring millions of followers with her balanced approach to wellness and family life.

Read More: Emily Blunt’s Workout Regimen: How She Got Toned for “The Fall Guy”

How Did Kourtney Kardashian Gain Weight?


The KUWTK star gave birth to her third baby recently in December 2023. Naturally, like most new mothers, she gained weight during her pregnancy. Since then, Kourtney has been on a mission to regain her pre-pregnancy body, and it's evident that her efforts are paying off. 

Her recent Instagram photos reveal a toned and fit physique, demonstrating her dedication to fitness and healthy eating. Additionally, Kourtney appears to be glowing more than ever, likely due to her dedication to overall wellness and self-care, as well as the joy and fulfillment she’s experiencing post-pregnancy.

Sarah Bauer, a renowned fitness expert, has been credited with helping Kourtney stay on track with her fitness goals. Their collaboration has inspired many, showing that dedication and the right guidance can lead to impressive results.

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Despite rumors and speculation, Kourtney's transformation is not linked to hardcore drugs or any weight loss drugs. Instead, her dramatic weight loss and toned figure result from consistent effort, a balanced diet, and a comprehensive workout routine.

How Did Kourtney Kardashian Lose Weight?


After giving birth to her third baby in December 2023, Kourtney been on a mission to get her pre-pregnancy body back — and to say it best we can all see it’s working. 

The 45-year-old socialite recently shared a new photo on Instagram, showing off her toned belly and hips in a bra and pajama pants. The comments section was quickly filled with love and admiration for her stunning new look. She also talked about her intermittent fasting routine on social media, explaining that it involves not eating for 14 to 16 hours after dinner.

According to her trainer, Don Brooks, Kourtney has been working out 3-5 times a week, with each session lasting 45 minutes to an hour. Brooks' Don-a-Matrix training, involves a mix of high-octane (energy-packed) moves, such as planks and trunk twists, which help to tone and strengthen the body.

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Known for her entrepreneurial spirit, Kourtney, the Talentless founder, has shared her struggles with sugar cravings and showing her strategies to overcome them. Her journey is a testament to how hard work and perseverance can achieve a healthy and fit body without resorting to desperate attempts or unhealthy shortcuts.

Read More: Emily Simpson’s Weight Loss: The RHOC Star's Stunning 40-Pound Transformation

Kourtney Kardashian’s Weight Loss Diet


Over the past couple of months, Kourtney Kardashian's body transformation has been a topic of conversation. Her commitment to fitness includes both intense workouts and more mellow routines. By balancing high-energy sessions with gentler exercises, she maintains her toned physique and overall wellness.

Kourtney's diet also plays a crucial role in her transformation. She incorporates almond milk into her meals for a healthier alternative to dairy. Dining at places like Catch Steak, she ensures her meals are nutritious and aligned with her dietary goals.


In interviews and social media posts, she emphasizes the importance of nourishing her body with nutrient-dense meals while avoiding processed foods and excessive sugars. Kourtney Kardashian follows a high-fat keto diet plan. As she has shared on her lifestyle site Poosh, her doctor advises her to follow the keto diet for brief periods to detoxify metals and toxins from her body.

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Kourtney uses a (Ketone Monitoring System) device daily to accurately check and monitor her blood sugar levels, ensuring she remains in ketosis. This helps her understand which foods affect her ketosis status.

Breakfast: Kourtney usually starts her day with avocado keto smoothies. These smoothies are not only delicious but also packed with healthy fats that support ketosis and provide sustained energy.


Lunch: For lunch, Kourtney enjoys salads that are dairy-free and rich in fresh ingredients like cucumbers, almonds, and spinach. These nutrient-dense salads offer a refreshing and satisfying meal while keeping her in ketosis.


Dinner: Dinner often consists of organic ground beef burgers and organic chicken fajitas. Her meals are completely gluten-free and dairy-free, aligning with her Keto plan while ensuring a clean and wholesome diet.

While Kourtney personally loves the keto diet, she acknowledges that it may not be suitable for everyone. If you're considering the keto diet, it’s essential to consult with your doctor first to ensure it aligns with your overall health and dietary needs.

In interviews, Kourtney Kardashian encourages others to listen to their bodies, eat intuitively, and make sustainable choices that support long-term well-being. She emphasized the importance of maintaining high-calorie intake with nourishing foods while on-demand breastfeeding to nurture her baby via Instagram. Her diet plan reflects a balanced and mindful approach to nutrition, contributing to her successful weight loss and overall wellness journey.

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Read More: Kim Kardashian's Weight Loss Journey: A Comprehensive Guide

Kourtney Kardashian Workout Routine

As we can see on the reality show, the Kardashian sisters are avid proponents of exercise and maintaining their fitness throughout their lives. Kourtney Kardashian, in particular, has showcased her dedication to physical fitness through various workout routines that she integrates into her busy schedule. Here’s a closer look at some of her favorite workouts:


The 12-3-30 Workout (a.k.a. the Hot Girl Walk)

The 12-3-30 workout, popularized by Kourtney, involves walking on a treadmill set to a 12% incline at a speed of 3 mph for 30 minutes. This simple yet effective routine is great for burning calories, improving cardiovascular health, and toning the lower body. It's also an excellent way to get in some low-impact exercise while enjoying a good podcast or playlist.

Kourt’s Full-body Dumbbell Workout

Kourtney’s go-to full-body workout, designed by her trainer Donamatrix, focuses on using dumbbells to target all major muscle groups. This routine was crucial in helping her lose baby weight, boosting her energy, and toning her entire figure. Typically, Kourtney likes to break her session into quarters. This approach keeps her motivated throughout the workout and allows her to manage the intensity more effectively.


HIIT with Amanda Lee

For high-intensity interval training (HIIT), Kourtney turns to trainer Amanda Lee. HIIT workouts are known for their efficiency in burning fat and improving overall fitness. These sessions involve short bursts of intense exercise followed by brief rest periods, helping Kourtney maintain her toned physique, cellular metabolism, blood circulation, and high energy levels.

An ice pack has become one of her go-to tools for recovery, helping her soothe muscles and reduce inflammation after her workouts. This dedication to fitness and self-care has led to a noticeable change, often referred to as "queen energy" by her fans.


She gradually eased back into fitness with uphill treadmill walks and stroller outings, prioritizing self-care and encouraging others to be gentle with themselves on social media. Her workouts also include swimming, yoga, and pilates from time to time.

Kourtney Kardashian Before And After Weight Loss Photos

Before


After


From KUWTK to her recent journey through motherhood, Kourtney Kardashian’s weight loss has exemplified resilience and dedication in maintaining her health and fitness. With utmost dedication, she decided to shed baby weight and embarked on a health and fitness journey, wherein she prioritized eating healthy, cutting back on processed foods, and working out regularly. Her consistent workouts, mindful eating, and professional guidance helped her reclaim her pre-pregnancy body with remarkable success. From her journey, we can learn that consistency is the key to keeping the body healthy and the mind happy all the time! 

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FAQ's

What motivated Kourtney Kardashian to lose weight?
Kourtney Kardashian's motivation to lose weight primarily came from her desire to maintain a healthy lifestyle and set a positive example for her children. Additionally, after giving birth to her three children, she wanted to regain her pre-pregnancy physique and overall wellness.

Did Kourtney Kardashian have professional help during her weight loss journey?
Yes, Kourtney Kardashian enlisted professional help during her weight loss journey. She worked with personal trainers and nutritionists to develop effective workout routines and meal plans. This professional guidance helped her stay on track and achieve her fitness goals.

How long has Kourtney Kardashian been on her weight loss journey?
Kourtney Kardashian's weight loss journey has been ongoing for several years, particularly intensifying after the birth of her children. She has been consistent in her efforts to maintain her fitness and health, incorporating various routines and dietary changes over time.

What advice does Kourtney Kardashian give to others trying to lose weight?
Kourtney Kardashian advises others to stay consistent, set realistic goals, eat whole foods, stay hydrated, get professional help, and practice self-care to achieve weight loss and overall wellness.

About The Author
Sanchari Bhattacharya
Sanchari Bhattacharya
Health & Fitness Expert

Sanchari, a certified Health & Nutrition Life Coach and Naturopath, has 10+ years of experi...

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