Online Training by MARR STRENGTH®

Train the method from anywhere.

BoxMatrix® is the online training extension of MARR STRENGTH®. Start through the web checkout first, then download the app and log in with the account you created.

Start here

Create the account first.

Do not download the app first. Start through the web checkout so your subscription and trial are set up correctly. After that, download the app and log in.

Step 01

Start the trial

Use the web checkout to create your BoxMatrix® account and activate the trial connected to the subscription.

Step 02

Download the app

After your account is created, download the BoxMatrix® app from the App Store or Google Play.

Step 03

Log in and train

Use the same login you created at checkout. Your subscription access will be available inside the app.

BoxMatrix® subscription

Start with the foundation.

The app gives you access to the foundation work, core BoxMatrix® training, and supporting programs built from the same method used in-house at MARR STRENGTH®.

7-day trial

BoxMatrix® Subscription

$35 / month

Online training access built around the MARR STRENGTH® method.

  • Start with a 7-day trial
  • Foundation program access
  • BoxMatrix® training access
  • Shoulder Matrix program access
  • Cancel anytime
Start 7-Day Trial

Important: sign up first

Start through the web checkout before downloading the app. This makes sure your account, trial, and subscription access are set up correctly.

Then download the app

After your account is created, download BoxMatrix® and log in with the same email and password.

Follow-up guidance

After signup, you’ll receive a follow-up email that helps explain how to approach the app and where to begin.

What you get

The method organized for online training.

BoxMatrix® gives users a structured way to build the foundation, train with the method, and continue developing key areas of the body.

Start here

Foundation Program

A longer course-style program designed to establish the base of the method before users branch into more training options.

  • Method foundation
  • Movement education
  • Best starting point
Core training

BoxMatrix® Training

The original reliable training system inside the app. This is the core training experience people come back to because it works.

  • Proven training structure
  • Full-body development
  • Built from the in-house method
Upper body

Shoulder Matrix

A focused program for shoulder development, upper-body control, and athletes who need better function through the shoulder complex.

  • Shoulder-focused work
  • Great for athletes
  • Supports upper-body coordination
FAQ

Common questions.

Open the questions below for the details that usually come up before starting.

Should I download the app first?

No. Start through the web checkout first so your trial and subscription access are connected correctly. After your account is created, download the app and log in.

How do I start?

Click “Start 7-Day Trial,” create your account through the web checkout, then download the BoxMatrix® app from the Apple App Store or Google Play.

What should I do first inside the app?

Start with the Foundation Program. That program establishes the base of the method and gives you a cleaner starting point before layering in other training options.

Can I cancel anytime?

Yes. The BoxMatrix® subscription can be canceled anytime.

Is this the same method used at MARR STRENGTH®?

Yes. BoxMatrix® is the online extension of MARR STRENGTH® and is built from the same training method used in-house.

Will I get guidance after signup?

Yes. After signup, you’ll receive a follow-up email that helps explain where to begin and how to approach the app.

Start online

Create your account, then train through the app.

Start through the web checkout first. Once your account is active, download BoxMatrix® and log in with the same account.