Britt Holterman

Core Commitment: 4 Weeks to a Stronger Core

Because Everything Starts at the Core

Build strength from the inside out with this 4-week Core Program. Complete 4 focused 5–15 minute workouts each week designed to fit your busy life. The program progresses as you get stronger and keeps things fun with plenty of variety. Gain the core strength you need for everything from motherhood to peak performance. Strong core. Strong body. Strong life.

4-Week Core Commitment

How did you like this?

Goal:
Strength

Bodyweight, Core/Abs

4 weeks program 4 days/week <30 mins

Level:
All Levels

Goal:
Strength

Bodyweight, Core/Abs

4 weeks program 4 days/week <30 mins

Level:
All Levels

About the program

Build the Foundation for a Stronger You This 4-week Core Program is designed to help you build real, functional strength that supports you in every part of life—from motherhood to athletic performance. Each week, you’ll complete four focused core workouts, each lasting just 5 to 15 minutes, making it simple to stay consistent even with a busy schedule. The program is progressive, meaning the workouts will grow with you as your strength improves. You’ll build a solid foundation without feeling overwhelmed. With a wide variety of movements and formats, you’ll stay engaged, challenged, and far from bored. A strong core is more than just toned abs—it’s the powerhouse behind better posture, stability, mobility, and performance. Whether your goal is to move with more confidence in daily life or push your athletic limits, this program will help you feel stronger from the inside out. Strength starts at the core. Let’s build yours.

Quick, effective core workouts
Program that progresses with you
Unlimited messages and DM support
And more...

Here is a taste of what you can expect...

Day 1

4.9

Day 2

5.0

Day 3

5.0

Day 4

5.0

Day 5

5.0

I do Britt's stand alone core workouts on my busiest days. They're efficient, effective and feel like a break... until I'm actually doing them!

Meghan

Britt's core classes are quick, effective and well rounded. They have made me a better lifter, runner and certainly leveled up my overall fitness!

Lindsay

I loved that this program hit all aspects of my core. I noticed a big difference from start to finish.

Alex

App Features

Reminders

Set workout reminders to stay on track!

Tracking

Track your progress and share it to Instagram

Notes & Logging

Track your weights, time, and reps. Take notes to capture your thoughts when working out

Streaks

Make sure you stay on track with your goals

Favorites

Save your favorite workouts with one tap

Lifetime Access

Once you purchase, you own the program forever!

Reminders

Set workout reminders to stay on track!

About Britt Holterman

Online personal trainer

Hi, I’m Britt — founder of Legacy Gym. I launched Legacy in 2016 after years of searching for a gym that truly fit. As a former Division I basketball player, I craved a space that blended real results with a strong, supportive community — and I couldn’t find it. So I created it. I’m a certified personal trainer, MovNat trainer, and TRX-qualified coach. I’ve competed on three seasons of American Ninja Warrior, and I’m currently a HYROX and DEKA athlete. I also hold a master’s degree in Water Resources Engineering and am a licensed professional engineer. Outside the gym, I’m a wife, mom of three, and proud dog mom of two. I know firsthand how hard it can be to make time for yourself — especially when you’re juggling a million things. That’s why I design programs specifically for busy women, especially moms, who want efficient, effective workouts that actually work. My training plans are built with purpose: they progress as you do. You’ll feel stronger, see real results, and keep moving forward — one workout at a time.

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