Strength is so much more than just what you lift in the gym
Our mission is simple but powerful: to build the strongest version of yourself, inside and out.
We believe fitness should empower you, not restrict you and most importantly, you don’t have to do it alone—because of StrengthInUs.
why you should join StrengthInUs
Sustainable progress. Strength that carries into every part of your life—from your workouts, to your mindset, to your daily decisions.
Lift more than weights
If you’re tired of chasing the scales, starting over, and feeling stuck in a cycle that never lasts, it’s time for something different. This journey isn’t about shrinking yourself—it’s about becoming the strongest version of yourself.
Stay accountable
The StrengthInUs app gives you the structure you need to stay consistent
even on the hard days.
No more guessing.
Results that last
StrengthInUs is built to help you create results you can actually maintain—without cutting out everything you love.
We’re here for real change.
No more fad diets
No more all-or-nothing, no more crash diets. Just simple, effective habits that build a strong body and a stronger mindset —
for life.
our programmes
When it comes to your fitness journey, there’s no one-size-fits-all. That’s why StrengthInUs offers two options—both designed to help you reach your goals in a way that works for you.
10 week block
StrengthInUs 10 Week Challenge
Weekly personal check-ins with your SIU coach
Weekly Q&A with Coach Sarah
Personalised calories & macros (assessed weekly)
7-day Customisable Meal Plan
1000+ Recipes
Full Food Tracker on the App
Barcode Scanner
Progressive Strength Workout Program- 3,4,5 day / Home or Gym / Time Crunch
All HYROX workouts & HYROX Programmes
(highlight programmes)
All Running workouts & Running Programmes
(highlight programmes)
Yoga & Meditation Classes
Video Education Library to support all areas of your journey
Private WhatsApp group with Sarah & SIU team
Guest Speaker webinars + access to ALL previous speakers
New weekly recipes + exclusive blogs/videos/resources
monthly subscription
StrengthInUs Active
29.99 a month
calories and macros personalised
Generated meal plan
Full Food tracker on the app
progressive strength workout program
All hyrox workouts
All running workouts
100s Yoga classes
100s meditation classes
Facebook community
monthly subscription
StrengthInUs Active:Plus
39.99 a month
calories and macros personalised
Generated meal plan OR can customise your own meal plan with SIU recipes
Full Food tracker on the app
progressive strength workout program
All hyrox workouts and hyrox specific programs created SIU hyrox coach
All running workouts and 5km, 10km, half marathon program created by SIU running coach
100s Yoga classes & Yoga specific programs created bu SIU yoga instructor
100s meditation classes
Facebook community
meet Sarah Catterson & learn her story
From never loving sports, to empowering women to transform their health and fitness journey worldwide.
ready to make the change? let's do it together.
We've created a space where women of all fitness levels come together to shape their future.
Real Transformations
Over the last 6 years, we’ve seen countless physical transformations, from weight loss goals to muscle gain.
Supportive Community
Join a community of women who uplift and motivate each other to get stronger together.
Flexible Options
Choose between intensive 8-week challenges or monthly subscriptions based on your accountability needs.