The 12-Week Challenge kicks off on July 1, 2024!

Get instant access to the workouts

The official challenge with email support starts July 1

Prepare to feel the burn as you strengthen, lengthen & sweat

This 12-week Core Challenge program will transform your core, build muscle definition and improve overall strength.

Sign up & receive...

  • 40 different workouts in total ranging in time from 10 – 60 minutes (average length 30 min)
  • A printable wellness calendar to track your progress
  • A private group chat with everyone in your current challenge for support & accountability
  • BONUS: A live workout with me (replay available)
  • NEW BONUS: TWO 4-week meal plans and grocery lists
  • NEW BONUS: By popular request, access to 12 Bliss-mas tension-releasing stretches

 Sign Me Up! 

Each week you’ll complete 3 different full-body workouts that combine Pilates, Barre and functional training

We build on Pilates principles and take core work, full body strengthening and muscular endurance training to a greater intensity. These are our toughest classes – not for pregnancy or postpartum.

Sign Me Up!
  • Deepen your core connection
  • Get powerful results
  • Sweat in all the right places
  • Support & accountability


Hi, I’m Nikki Bergen.

As a pilates instructor who specializes in pelvic health in pregnancy, postpartum and beyond, I've worked with 1000s of women over the last 14+ years.

Timing matters when it comes to your pelvic floor and core, so at The Belle Method we create resources and offer courses to help you meet in your exact life stage.

But be warned–this 12-week challenge is straight up diabolical, my friends. You're gonna get results!

★ ★ ★ ★ ★

“I'm soo obsessed!”

I can't get enough of how good this is. Just can't get over how small movements are so impactful and I LOVE what it's doing for my core.


★ ★ ★ ★ ★

“I have been doing Belle Method workouts for years!”

Nikki's instructions are clear and precise to ensure you are doing the movements properly for maximum results!!



What is the challenge schedule?

This is a virtual program so it’s as easy as signing up to get full access in your portal. From there, you’ll find the entire program pre-recorded so you can create your own schedule.

What happens if I take longer than 12 weeks to finish the challenge?

Give yourself grace, and please don’t worry. You’ll have access to the workouts for 6 months from your purchase date.

What equipment will I need?

You will need a booty band, 2 or 3 lb. weights, a towel and a mini stability ball.

For $179 CAD ($129 USD) you’ll train your core like never before with minimal equipment.