Hit your 90-day target or you don't pay a penny.
Most plans assume you have nothing else going on. CORE4 assumes you do. Four weekly levers, sessions that adapt around your week, and one coach in your corner.

Hit your 90-day target, or you don't pay a penny.
How much weight do you want to lose?
Input your current weight, target weight and weekly training commitment to see how demanding your 90-day target will be.
The CORE4 framework. Four levers, every week.
Sessions that adapt around your week.
We pull the biggest levers and ignore the noise. Compound lifts, dialled-in rep schemes, recovery built into the calendar. Your training is built for the busiest week of your year, because that's the week most plans fall apart.
- / ACustom programming reviewed every 7 days
- / BForm check video reviews within 24h
- / CHotel-room, garage and full-gym variants
- / DPeriodised for travel, deload and life
A coach in your pocket.

Built around the essentials. Engineered for the chaos.
CORE4 runs through a single app. No spreadsheets, no lost WhatsApp threads. Daily check-ins take thirty seconds. Coach replies inside 1 hour. Your training, your macros, your sleep score and your direct line live in one place.
- / 01Daily check-inWeight, sleep and steps in under 30 seconds. Photos once a week.
- / 02Direct line to coachVoice notes and DMs. Replies inside 1 hour.
- / 03Adaptive plansTraining and macros shift weekly based on your progress.
- / 04Travel & restaurant modeHotel-room sessions and a restaurant playbook for client dinners and travel weeks.
150+ men. Lives as busy as yours.
Real clients, real schedules, real check-ins.











Hit your 90-day target, or you don't pay a penny.
What ninety days looks like.
Diagnostic call, app setup, first workout in 48h. No guesswork.
We get into the plan, read your current stats, and optimise from real data instead of random numbers.
Macros tuned, baseline strength up 8 to 12%, energy back. Pattern is locked.
Target hit, four lifts up, a routine that survives the worst week.
Sessions that adapt around your week.
Meet Caelum.

I built CORE4 because I couldn't find a coach who took my schedule seriously. Every programme I tried assumed I had two hours to lift and three to cook. Most of my clients have neither.
I grew up skinny and got bullied quite a lot. I started working out at 15 and found this was the first time I was actually good at something. After years on the gym floor as an in-person PT, I went online because the math is obvious: a coach embedded in your week beats a coach you see for an hour, every time.
Since 2024 I've coached over 150 men through CORE4. Tech founders, surgeons, agency owners, dads. The pattern is always the same: they don't need more information. They need a system that adapts around their life, not one that overturns it.
Why this makes sense for you.
The programs for men who are too busy for an average fitness plan.
A 14 day challenge to get wins under your belt with your fitness and prove that even when you are busy running a business, the right system still lets you get in shape alongside it.
- A 14 day taste of the CORE4 system
- Daily habit targets
- Fast wins with training and nutrition
- No card, no catch
For men who do not want or need a 1:1 coach, but still want to be surrounded by like-minded people on the same journey. We are the product of the people we surround ourselves with.
- Group training & nutrition frameworks
- Weekly group check-ins
- Like-minded men on the same path
- Cancel any time
The full private coaching programme: fully customised, constantly adapting and optimising around your schedule, so by the end of 90 days you have a bulletproof system built exclusively for you and your lifestyle.
- Custom training & nutrition plans
- Daily app check-ins, replies < 1h
- Weekly 1-1 optimisation calls
- Hit your 90-day target or refunded
What clients say.
Hit your 90-day target. Or you don't pay a penny.
Lose 15lbs, get abs, or hit whatever challenge you set yourself. I'm so confident I'll get you there that if you follow the system and miss the mark, I'll give you all of your money back. You're paying for results, not a helping hand.
Common questions. Straight answers.
Apply for CORE4.
- 01Fill in the application, then choose your call time without leaving this page.
- 02I'll review your application and confirm the call if I think the program will help you.
- 03We use the call to decide whether CORE4 is right and get your custom plans in the pipeline.