SIN 21-Day Challenge
Brand New Facility for 2026
Only 20 Spaces Left
2025 Your Year
We are opening 20 spaces to our brand new renovated fitness space in Whitefield, for our new 21-Day Challenge.
Starts 19th January 2026
Your place is reserved for
Grab your spot now!
SIN 21-Day Challenge
Brand New Facility for 2026
Only 20 Spaces Available
Starts 19th January 2026
We are opening 20 spaces to our brand new renovated fitness space in Whitefield, for our new 21-Day Challenge.
Your place is reserved for
Grab your spot now!
What our Clients say...
Verity
Verity
"I feel a lot different about myself. It has helped with my mood, I feel really strong & I feel fitter"
"I turn up & the planning is done for me. I love the variety."
"Most of all I love all the friendly members & trainers. I feel really welcome."
Lauren & Josh
Lauren & Josh
"Every week is slightly different but I get the consistency of building my lifts"
"Meet new people & improve my confidence"
"I ran a marathon, which I never thought I could do & can now do pull-ups!"
"Every week is slightly different but I get the consistency of building my lifts"
"Meet new people & improve my confidence"
"I ran a marathon, which I never thought I could do & can now do pull-ups!"
Starting on 19th January 2026, we will help you become fitter, healthier & stronger in 21 days!
Or you get your money back.
Do you want a plan that actually delivers?
Get expert coaching, proven programming & the support of a like-minded community that keeps you consistent, motivated, and on track.
Yes? Then this is for you!
Do you want to live a longer, healthier more energised life?
You're not doing this alone—join a team that helps you stay consistent, motivated, and strong for life.
Yes? Then this is for you!
Tried and failed before? Feel the support a community that’s with you every step of the way. Train smart. Live loud. Feel unstoppable.
No guesswork. Just smart training, real progress & people who get it.
Sign up now to the SIN 21-Day Challenge for just £197.
What is included?
6 x Small Group Personal Training Sessions
Unlimited Class Access for 21 Days
Individual 1-1 Strategy Session with an Expert
Inbody Body Composition Scan
Expert Nutrition Support
Assigned Coach for Accountability
Let's break it down further
6 x Group PT Sessions AND Unlimited Classes
Our experienced team of coaches offer the highest standard of group coaching available. Individually adjusted to suit each participant, these sessions are specifically designed to; deliver results, overcome bodily niggles, and make you feel great!
Value: £175
Diet Review + 21-Day Food Plan
Our in-house nutrition education system is designed to be simple, effective and remove any confusion around how best to eat if you want great, life-long results.
Value: £100
Inbody Scan
You’ll get exclusive access to our newest piece of kit to gain your vital stats on Muscle mass, Body Fat and Bone density.
Value: £100
Goal Setting & Accountability
Knowing what to do is one thing, but having the support to implement it is what makes us so confident you will attain your results. We deliver your 21 day action plan through your own dedicated SIN coach.
Value: £120
Individual Movement Screening
Our expert-led movement screening is designed to reduce injury risk, improve joint health & tailor your training for long-term results. It’s the first step to moving better with confidence.
Value: £125
Members Support
You’ll get ongoing support from our coaching team and community to help you stay consistent, accountable, and confident every step of the way.
Value: Priceless
That total value of this package is £620!
Get results like Verity, Lauren & Josh for just £197
Get all the benefits of one-to-one personal training at a fraction of the cost, with expert coaches who bring over 25 years of experience. Enjoy a welcoming community & constant support.
STILL NOT SURE?
Frequently Asked Questions
What is small group personal training?
Small group personal training combines the individual attention of personal training with the motivation and affordability of a group setting. Groups are capped at 6 members per session and are led by an expert coach.
How is this different from a regular gym class?
Unlike generic fitness classes, our sessions are tailored to your goals, fitness level, and progression. It’s like having a personal trainer, but in a supportive small group environment.
Do I need to be fit to join?
Not at all! We welcome all fitness levels—from complete beginners to experienced gym-goers. Your workouts will be adapted to suit your current ability.
Where are you located?
Our gym is based at Sedgley PArk Rugby Club in Whitefield, Manchester and with free onsite parking.
How long are the sessions?
Our sessions typically last between 50 to 55 minutes.
How do I get started?
Tap one of the orange 'Grab Your Place Now' buttons and fill out the short info form. A member of our team will call you within 24hrs to answer any questions you have and get you booked on.
What if I'm a complete beginner?
No problem. The 21-Day Challenge is designed for all fitness levels, including complete beginners.
The initial assessment we do with you 1-1 gives us a clear idea of your ability level and the goals that are most important to you. This allows us to tailor the training sessions specifically to your needs.
You'll have a coach to support you at all times who will help you progress at the right pace. Before you know it, you'll feel completely at home here at Strength In Numbers and far more confident too.
What if I miss a few days?
Life happens and it's unlikely you'll get a completely clear stretch of 21 days where nothing gets in your way. Thats fine. If you miss a few days we will work with you to make sure you still get the most out of your experience and make progress.
What if if I have an existing injury?
A lot of people come to SIN with aches, pains, or previous injury history. We'll discuss this with you during your 1-1 session and carefully plan around any limitations.
What happens after the 21 days?
If you've loved your 21-Day Challenge, you can easily transition on to one of our memberships.
This will be discussed with you in full towards the end of the 21 days and once you have a feel for how often you would like to attend SIN sessions as part of your week.
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