Learn exactly how I physically transformed myself and went from 113kg to 10% body fat so you can do it for yourself, feel proud of your physique and achieve peak mental output.
Learn about my cutting-edge LeanOS programme.
Imagine what your new life + body feels like.
Then we'll execute to make it happen.
Cards on the table, I love efficiency and systems – and that’s why you need to be working with me for the next 3 months.My mission with LeanOS is to level you up with a body you’re proud of as efficiently as possible + get you a brain boost that matches. Intelligent systems, actually enjoying your life in the process, and a sprinkle of bespoke AI... the world's your oyster.You're here because you want a few simple things:
Yes to health, performance and the insane life upgrade you get from investing in yourself...But undeniably, the bod is a big perk too.
You want clothes that fit you perfectly.
Or maybe you want to go all in on the abs like I did!
An evidence-based beeline to results without the BS you hate and all the unnecessary sacrifice.


You don't want to kill yourself in the gym all week. You don't have to.
We'll build tactical strategies that give you more freedom and introduce minimum effective dose for exercise so that you can bank the spare time.
I've battle-tested this whole thing – MVP > all else.

Your lifestyle should 100% be part of the plan → that's how intelligent people stay consistent.
If your work/social life has gotten in the way before, it's probably because your plan didn't include it.
Just to be perfectly clear: your social life is a key component of your success.
The only way to build a body that lasts is through building a life you actually enjoy. That means:
Discovering a daily habits that sharpen your edge and create your dream physique by default.
Building a system of these daily habits with your career and social life top of mind.
That is the only way to stay consistent and secure the best version of yourself for good.





Privacy is important: I don't ask clients for pics, but some are keen to help me on my mission (because we all know a picture speaks 1,000 words).That's me in the middle by the way! Crazy.
Top Level Expertise
You + me + your plan.
A system built for your professional and social demands.
Designed to flex with you when you need (no template BS).
Minimum effective dose for maximum output.
Real-Time Strategy
With bespoke AI.
Offload decision fatigue to the world's most intelligent coach.
Instantly remove guesswork from everyday decisions.
Built in protocols for constant assurance.
Accountability Check-Ins
To secure the win.
Regular check-ins help you show up for yourself.
Synchronous and asynchronous, whatever suits you.
Permanent results.
Together we'll create a streamlined, dynamic plan that seamlessly combines your target outcomes without losing what's most important in your life.
Direct access to me so that we can build your master plan.
Confidence in yourself or your ability to navigate obstacles.
Collaboration on the important, high-level decisions.


AI David, Your Co-Pilot:The real-time support behind your operation. He'll be responsible for helping you with meals on the go, restaurant ordering, plan flexing...Total assurance, whatever comes up.
Old-style coaching means uncertainty and waiting for responses.
The new world means having a custom trained AI for tactical strategy, in your pocket, 24/7.
Offload decision fatigue to a trained expert in real-time.
This is what your experience looks like when you join LeanOS for private coaching:
Instant
Onboarding
Access the AI David protocols through LeanOS.
Effortlessly create an evidence-based, personalised plan.
We'll then workshop it to make sure it fits your lifestyle and target outcomes.
Easy
Management
Hybrid onboarding fast-tracks the start of your transformation.
AI David handles real-time decision making for frictionless progress + flexibility.
I help you secure the win.
Intelligent
Enhancement
We'll continue the uplift by introducing supplement protocols (optional).
Improve performance through sleep stacks + daily physical and cognitive boosts.
Entirely up to you depending on your goals.


David helped me change the course of my weight for the first time in over six years. I’d tried different extreme diets, but I could never maintain the results and kept drifting further from my target weight. With David, I started seeing steady, sustainable progress within the first few months. Together we built a system I trust, one that gives me confidence going into weekends and holidays that I can maintain my progress. It’s been genuinely life-changing: I’m healthier and lighter than I’ve been in five years, and I still feel like I’m moving forward. Thank you, David.🇺🇸 Hamish, New York

I’ve lost 5kg, but that’s not the end of it... I feel fitter, my sleep has improved and I have more energy. Having AI David was a game changer too, aiding my daily meal choices. My job is stressful, but I feel in a better position to deal with the stress and I've received so many compliments on looking better and happier!🇬🇧 Trisha, London



You were the first coach that had that niche – the corporate life of a nine-to-five. Maybe extra hours, maybe networking at night, maybe happy hours. I knew, this is my guy, because this guy experienced what I experienced. Every other guy or girl I saw were all just bodybuilders. It was a comfort because you went through the struggles that I ended up going through or the feelings or the mental side to it all.🇺🇸 Mack, New York

Highly recommend David to help reach your personal and aesthetic fitness goals! David catered the perfect personalised plan to help me achieve my desired results without sacrificing the lifestyle that I love. With David’s coaching I can now say I have the body I want and tools to maintain it. Thank you David!🇦🇺 Jesamine, Brisbane



I was looking for a solution to my myriad of failed diets and workouts. And wanting to understand why my attempts had stalled. David's guidance has made a massive difference not only in terms of my weight (8kg down baby!) but also my outlook on diet and exercise. I'm now leaner and more confident in my own diet, meal prep, and exercise routines because I can see the results.🇳🇿 Alex, Wellington
If you’d like an invitation to join the LeanOS programme, make sure you’ve followed me and then DM me "OS" on Instagram so we can chat.
Follow + DM David “OS” on Instagram

Your time is the most valuable thing you have.Don't waste it guessing. Enjoy the life upgrade sooner.The smartest way to get both the physical + mental uplift is to bring someone in who sees the clearest path to results in your life.I call it chaos alchemy → it's my secret weapon.If you know the value of your own time, want the bod, the better brain and the smartest path built for you – get me on your team.I used to weigh 113KG and now I'm 10% body fat.Believe me, what you want is possible.Let's get it for you. 👇🏼
©2026 David Robb Coaching. All rights reserved. Privacy Policy