Start Strength Training
Join the GET STRONG: 28-Day Challenge
Welcome to your new strength training plan - four flexible weeks of press-play workouts, motivation, and education.
The GET STRONG: 28-Day Challenge fits any mover, new to expert, and removes the guesswork from strength training.
No credit card needed. Just your email address and a desire to move better and feel better.
JOIN THE CHALLENGE
Ready to Kickstart Your Strength Training?
Start Here – You know you need strength training, but don't know where to begin.
Built-In Variety – You're bored with your current workouts and need something fresh.
Stick to the Plan – You want convenience and flexibility...but you also want structure.
Get Results – You're ready to commit to a 28-day plan that builds real strength.
Don’t go at it alone! With the GET STRONG: 28-Day Challenge, you’ll follow a proven plan featuring the same workouts people love in health clubs, YMCAs, and around the world. You'll move with motivation, learn from experts, and build a habit that sticks.
Ready to Get Stronger?
Get Muscle and Movement Strong in 28 Days.
JOIN THE CHALLENGE
Get to Know MOSSA On Demand
MOSSA On Demand is a streaming fitness platform designed to help people build strength, endurance, and confidence. With professional coaching, energizing music, and a variety of programs, it helps anyone create a workout routine that actually sticks.
Whether you are new to movement, returning after a break, or looking for fresh fitness motivation, MOSSA meets you where your and keeps you moving and improving.
What Makes MOSSA On Demand Different:
12 Expert-Designed Programs – powered by the same team trusted by health clubs and YMCAs worldwide.
500+ Professionally Coached Workouts – refreshed quarterly across MOSSA's worldwide network
All Formats, All Levels – strength, cardio, mind-body, HIIT, cycling, dance, mobility, and recovery.
Flexible Durations – 10-, 30-, and 60-minute options for every schedule.
Guided Recovery & Mobility Sessions – move better, feel better, live better.
Monthly Planners & Weekly Challenges – built-in structure and motivation.
A Real Community – members connect, support, and celebrate progress together.
When you join the GET STRONG: 28-Day Challenge, we guide you every step of they way.
And as a bonus, we'll unlock our full library so you can explore everything MOSSA On Demand offers.
Why the GET STRONG Challenge Works
Build Full-Body Strength & Endurance
The challenge teaches you how to strength train using our flagship program, Group Power, a mix of classic lifts and three-dimensional, functional movements that build muscle, resilience, stamina.
Get Accountability with Flexibility
Each week features five days of guided workouts or recovery - structured enough to keep you on track, flexible enough to fit your life.
Perfect for Every Fitness Level
New to strength training or ready to level up? Adjust your weights, follow modifications, and choose the intensity that's right for you.
Steps to Start Strong & Stay Strong
Provide your email address (no credit card required), and we'll email you a special link to access all of the content for the GET STRONG: 28-Day Challenge.
You'll need a barbell and a step - similar to what you see in the images on this page. If you need to buy it, go ahead and sign up for the challenge and we'll send you a coupon code to use at the MOSSA Store.
After you register for the challenge, we'll email you the 28 day plan as well as some highlights to help guide you every step of the way.
JOIN THE CHALLENGE
What People Are Saying
“MOSSA has enabled me to maintain my workout routine in a flexible and safe way that are necessary for my mental and physical well-being.”
Jennifer V.
via Email
“It's great to have 10-minute or 30-minute online classes to choose from since I'm usually fitting in my workout in my home office space.”
Amanda O.
via Email
"I love that I can be a positive role model for my kids and be a witness that you can keep moving no matter where you are physically or mentally."
Kara H.
Facebook Review
Frequently Asked Questions
How does the 28-Day Challenge work?
The challenge consists of 4 weeks, with each week having 5 days of workouts or recoveries.
We've also included some of our most pertinent education to give you insight and motivation on how to make strength training part of a healthy habit.
We'll guide you through every step of the process - including 10-minuute, 30-minute, and 60-minute workouts, a barbell technique video, and daily motivation!
What workouts will I do?
Your 28 days will include Group Power, our signature strength training program, and also Group Core, a functional strength, stability, and mobility workout. Some workouts are 30 minutes and some are 60.
Some days, though, you’ll have options to take a walk, watch educational videos (we’ll provide!), and enjoy guided recovery.
Do I need experience lifting weights?
No, these workouts are for every level, whether this is the first or five-hundredth time you’ve picked up a barbell.
Is there a cost to the challenge?
No. To sign-up and participate in the GET STRONG: 28-Day Challenge is completely free.
We're confident that you'll love your results so much (and love the MOSSA workouts), that you'll want to become a subscriber to MOSSA On Demand.
What are my options after the 28-Day Challenge?
After the 28 days, your free access to the MOSSA On Demand library will expire.
If you want to continue moving with MOSSA workouts, you'll be able to start a 14-day free trial (credit card required).
And if you do decide to remain a subscriber after the free trial, the cost is either $14.99 per month (paid annually) or $24.99 per month (paid monthly).
Can I get extra coaching from MOSSA?
As part of the GET STRONG 28-Day Challenge, we've launched a new channel on our in-app Community, specifically for people going through the challenge. You can ask questions, share your success, and connect with the MOSSA team and other subscribers from around the globe.
How does the registration work?
Just provide your email address, no credit card required, and we'll email you a special link to get started.
Move Better. Feel Stronger. Get Results in 28 Days.
The Get Strong 28-Day Challenge is your introduction, reintroduction, or reinvigoration for strength training! Give yourself 4 weeks and we’ll help you build more than muscles; you’ll build confidence, better balance, improved mobility, and a new healthy habit.
JOIN THE CHALLENGE