Claire Thomas

Claire Thomas

Core Challenge

Core Challenge

Six weeks to a stronger core

Save 50% with code: CORE50 - ends 12/01. My 6-week Core Challenge is my most popular program, helping 15,000+ people build a stronger core, improve posture, and feel more connected to their bodies. No equipment needed. Quick 10–20 min workouts you can do anywhere. Beginner to advanced - simple, effective, and truly transformative. It’s about showing up, building habits you can sustain & becoming stronger from the inside out.
Goal:
Shredding
HIIT, Bodyweight, Cardio, Core/Abs
6 weeks program 5 days/week <30 mins
Level:
All Levels
Goal:
Shredding
HIIT, Bodyweight, Cardio, Core/Abs
6 weeks program 5 days/week <30 mins
Level:
All Levels
cover image

About the program

Save 50% with code: CORE50 Black Friday deal ends 12/01 My Core Challenge is my most popular program. It’s a proven, time-tested 6 week challenge that has helped 15,000+ people build a stronger core, improve posture, shed stubborn fat & feel more connected to their bodies than ever before. It’s simple, effective & designed for real life. No equipment needed. You can do this program from home, the gym or anywhere else life takes you. It includes 3 core + 2 cardio workouts per week. They're all quick & effective (10–20 mins) & created to pair perfectly with your current training routine. This challenge strengthens your core while supporting your full-body training, helping you move better, lift stronger & feel more capable in everything you do. In addition to the workouts, each week introduces a new simple yet transformative habit - helping you build consistency in movement, create meaningful routines, nourish your body, & rediscover the power of play. For the first time ever, my Core Challenge is available as a standalone program. No app subscription required, once you purchase it, it’s yours to keep forever. Whether you’re a beginner or advanced, this challenge is fun, accessible & transformative. This is about so much more than core work. It’s about showing up, building habits you can sustain & becoming stronger from the inside out. 💛 Claire

    Weekly Core & HIIT Workouts

    Week 1 Habit: Drink >100oz of water daily
    Week 1 Habit: Drink >100oz of water daily
    5.0
    Week 1 Modifications
    Week 1 Modifications
    5.0
    Fit Test
    Fit Test
    4.0
    1
    HIIT
    HIIT
    5.0
    Week 2 Modifications
    Week 2 Modifications
    5.0
    HIIT
    HIIT
    5.0
    This challenge was so much more than just a core challenge. Kept me sane, accountable and consistent in not only my gym time but personal life.
    Loraleen
    Being a part of this awesome, supportive community along with using your programs over the last year have helped me get in the best shape of my life!
    Johanna
    10/10, loved it! It kept me accountable and introduced me to movements I have never done! The community was absolutely inspiring and motivating!
    Ashley
    I’ve used other apps & programs before but this just sticks. I feel more focused, driven & excited about the healthy habits & confidence it instills!
    Lisa
    Loved it! Like the variety every day and week. I enjoy having a planned workout to get myself out of bed before work during the week.
    Tara
    I feel better, look better, and finally feel like I am once again in control. The workouts, community, tips, and support made it possible!
    Dave
    This challenge was so much more than just a core challenge. Kept me sane, accountable and consistent in not only my gym time but personal life.
    Loraleen
    Being a part of this awesome, supportive community along with using your programs over the last year have helped me get in the best shape of my life!
    Johanna
    10/10, loved it! It kept me accountable and introduced me to movements I have never done! The community was absolutely inspiring and motivating!
    Ashley
    I’ve used other apps & programs before but this just sticks. I feel more focused, driven & excited about the healthy habits & confidence it instills!
    Lisa
    Loved it! Like the variety every day and week. I enjoy having a planned workout to get myself out of bed before work during the week.
    Tara
    I feel better, look better, and finally feel like I am once again in control. The workouts, community, tips, and support made it possible!
    Dave

    Real Results from Real People

    “I loved this challenge! I have been working on losing weight and working out for years but had been struggling and lost my passion for it recently. My core is definitely a weaker point in training so I decided this challenge would be perfect. In this challenge I lost about 13 pounds, developed a stronger core and found my passion for fitness again! The CPT app is a great tool and I have really enjoyed the functional plan along side the core challenge. Both have pushed me out of my comfort zone and challenged me which I loved! Claire is a great coach and was very present in the challenge which I appreciated! I’m sad this challenge is done but excited to keep going! Thank you Claire!”
    Jessica
    “Over the years, I have been pregnant four times, and am a mom to 5 awesome boys. My last pregnancy was during the lockdowns of 2020 & I gained about 80lbs, and I really struggled to shed the baby weight off this time around. Then I found Claire’s page & loved the functional fitness aspect of what she did! I loved that she seemed strong & confident! So when I saw that she was doing #clairescorechallenge I got super excited & decided to go all in! For the first time in my life, I followed a strict plan & stuck with it! So I am extremely thankful to Claire and #clairescorechallenge, because it has helped me and my husband get to a place physically, that has seemed somewhat unattainable before this. We are loving the results that it brought us, and we hope that more couples decide to try it together!”
    Amanda
    “Claire, Thank you for the kick start with this program. I fell off track after retiring from the fire department at age 52. I still have work to do and will keep grinding away! I will continue to follow your programs and keep clean eating, training and fitness in my life style for ever. Consistency and dedication is the key.”
    Jerry
    “Not every final result is a 6 pack - but that does not mean massive progress hasn't been made! I got very intimidated by other peoples "before" when first starting this challenge. Now it's freeing too remember to not compare my chapter 2 to someone's chapter 20. I birthed my third baby less than a year ago, work full time as a nurse rotating nights & days, & had just as many mental & emotional breakthroughs as I did physical. It's not a 6 pack, its not even a 4 pack, but what this is is me claiming myself & my health & believing in myself again. THANK YOU TO THIS GROUP!! You guys are the most sweet supportive community known to man."
    Olivia
    “This challenge has helped me get to a better place not only for myself, but for everyone else that calls for my help. Thank you Claire, for helping me find a new kind of strength to be able to do this job to the best of my ability, for others. I never want to let anyone down, and I want my family here at work to also be able to count on me, and because of your programs… they can.”
    Misty
    “I stand here today as living proof that there is hope, and resilience can conquer any adversity. Over the six-week challenge, I managed to shed 17 lbs while juggling the roles of a mom, full-time worker, and full-time student. I take immense pride in my achievements and the hurdles I’ve overcome. I express eternal gratitude to you and this community for restoring hope, fostering support, and helping me build a better future. Thank you!”
    Katie
    “I loved this challenge! I have been working on losing weight and working out for years but had been struggling and lost my passion for it recently. My core is definitely a weaker point in training so I decided this challenge would be perfect. In this challenge I lost about 13 pounds, developed a stronger core and found my passion for fitness again! The CPT app is a great tool and I have really enjoyed the functional plan along side the core challenge. Both have pushed me out of my comfort zone and challenged me which I loved! Claire is a great coach and was very present in the challenge which I appreciated! I’m sad this challenge is done but excited to keep going! Thank you Claire!”
    Jessica

    App Features

    Video Workouts
    Easy-to-follow videos for every workout in the app
    Favorites
    Save your favorite workouts with one tap
    Lifetime Access
    Once you purchase, you own the program forever!
    Notes & Logging
    Track your weights, time, and reps. Take notes to capture your thoughts when working out
    Reminders
    Set workout reminders to stay on track!
    Offline Downloads
    Workout anywhere - even without internet connection
    https://d3l5vala1x2h4r.cloudfront.net/1764046114224_IMG_7120-comp.PNGframe
    https://d3l5vala1x2h4r.cloudfront.net/1764046114224_IMG_7120-comp.PNGframe
    Video Workouts
    Easy-to-follow videos for every workout in the app
    avatar

    About Claire Thomas

    Welcome, I'm so glad you're here!

    Howzit!? 🤙🏼 I’m Claire, a certified personal trainer, nutrition coach & yoga teacher from Oregon. After my career as a Division 1 sprinter & heptathlete ended, my passion for sport transformed into something deeper: a love of movement in all its forms, & a calling to help others discover their own strength from the inside out. In 2017, during my senior year of college, I launched CPT Fit Co. What began as a side passion project has since grown into a global community of hundreds of thousands whose bodies & lives have been transformed by the program you’ll find here in this app. Along my journey, I’ve explored a variety of different training styles while traveling the world & living a nomadic lifestyle (including three years of van life), which taught me how important it is to make fitness not only effective, but also flexible, fun, & accessible, whether you’re moving with just your bodyweight, unrolling a yoga mat on the beach, or strength training in a fully equipped gym. Here, you’ll find programs that reflect this journey, functional cross training, kettlebell flows, home & gym workouts, running programs, follow along yoga & mobility & so much more. My goal for this app is not about chasing aesthetics… it’s about falling in love with the process of taking care of yourself. It’s about honoring the privilege of movement & building a body that carries you through life with ease & joy. I’m so grateful you’re here. This is my passion & my purpose, & if these programs can help you move with more freedom, feel stronger, & live more fully…I’d consider that the greatest privilege of all. With gratitude, Claire

    Frequently asked questions

    What are the goals of this Challenge?
    The physical goals of this Challenge are to strengthen & define your core while shedding overall body fat! However, it’s about SO much more than abs! We will also focus on creating many new healthy lifestyle habits that will help us excel in all areas of our lives.
    How do I schedule this program into my weekly routine?
    This program should be done in conjunction with your existing training plan. The core & HIIT workouts in this challenge are quick & effective & designed to be done in addition to your main workout each day. Simply add these workouts to the beginning or end!
    What equipment is required?
    No gym membership or equipment is required for this challenge! For any exercise that uses a piece of equipment (for example: a pull up bar) I have also provided an alternative exercise that requires nothing but your bodyweight. You can do these workouts from anywhere!
    Who are these workouts for (skill-level)?
    Whether you are brand new to fitness or highly advanced, you will benefit from this challenge! Plus, I walk you through all exercises with easy-to-follow videos and simple written instructions. This means you’ll be able to do all my moves easily, accurately, and safely.

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