START HERE: THE LETHAL GENTLEMEN'S CLUB
How to Navigate & Use The Lethal Gentlemen's Club.
The Lethal Gentlemen’s Club is for the man who wants to dominate in all arenas of life.
We cover these 4 topics:
Fitness: Building a Lethal Physique using world class training, nutrition & health protocols.
Injury & Recovery: Building a durable body that doesn’t break under stress using proven rehab protocols and recovery systems.
Mindset & Productivity: Building elite mental performance using battle-tested systems for focus, output, and decision-making.
Lethal Lifestyle Design: Designing a life where you’re elite across business, fitness, and everything that matters.
Everything you need to become a top 1% man.
A Lethal Gentleman.
A Modern Renaissance Man.
Who am I?
I’m Jack Krucial: Former professional athlete, physiotherapist, and performance consultant to MMA fighters (ONE FC, Bellator), elite athletes, and high-performing businessmen worldwide. I’ve been mentored by coaches behind Anthony Joshua, Formula 1 drivers, and US special forces operators. I’ve spent 5 years running a performance business and refining these systems across the globe.
I’ve designed this page to be your complete roadmap. By the end, you’ll know exactly what’s inside The Lethal Gentlemen’s Club, which protocols to start with, and how to progress from average to elite across all three domains.
START HERE: FUNDAMENTALS
How to Train Like a Lethal Gentleman: The training system that builds raw strength, an elite gas tank, violent power & combat capability simultaneously.
How to Eat Like a Lethal Gentleman: The nutrition system that fuels intense training, sharp cognition, relentless energy & peak performance.
How to Build a Lethal Mindset: Manifestation & motivation are BS. Here’s a framework that will change the way you view achieving your goals.
The Lethal Recovery Guide: definitive tier list of what actually works for recovery, cutting through fitness industry BS.
Krucial Neck Training Guide: Free PDF resource combining my learnings from Formula 1, UFC & Olympic Wrestling (10,000+ downloads & counting).
MONTHLY TRAINING PROGRAMS
Each month I give you a protocol you can follow. These are guideline based protocols which show you different exercise sequences & how it can all be blended together.
Lethal Gentlemen’s Protocol November: This month’s addition gives you a protocol with minimal equipment (barbell, dumbbells, pull up bar).
Lethal Gentlemen’s Protocol October: This protocol is an upper body, lower body & full body split (one of my favourite training structures).
Lethal Gentlemen’s Protocol September: This protocol gives you Lethal Capacity standards & is a 3 day full body protocol.
Lethal Gentlemen’s Protocol August: For those of you who want to run 4x weight lifting session, this protocol covers a 2x upper / lower split.
SPECIALIST TRAINING PROGRAMS
Striking Specialist Protocol: 12 week training program specifically designed for strikers (Boxing, Muay Thai, Kickboxing, MMA).
Submission Specialist Protocol: 2 week training program specifically designed for grapplers (BJJ, Judo, Wrestling, MMA).
Return to Sprint Protocol: 12 week return to sprint protocol (perfect for those of you who are interested in how to return to sprinting safely & minimising injury risk).
The Lethal Core Protocol: 3-Phase core protocol to avoid wasting time doing endless planks & other BS core workouts.
Rotational Power Protocol: One of the missing pieces in almost every man’s training routine. Rotational power & how to develop it.
How to balance Weight Lifting & Martial Arts: The Ultimate guide of balancing weight lifting with martial arts training.
VO2 Maxxing Protocol: How to build an elite gas tank that enhances muscle gains rather than killing them through a 3-step system.
INJURY & RECOVERY PROGRAMS
The Shoulder Durability Protocol : 12-week shoulder injury protocol designed to rebuild your shoulder to become durable & athletic.
The Foot & Ankle Durability Protocol: 4-phase foot & ankle injury program which includes mobility, strength & jump training.
The Low Back Durability Protocol (Coming soon)
The Knee Durability Protocol (Coming soon)
The Hip Durability Protocol (Coming soon)
NUTRITION & GUT HEALTH (COMING SOON)
Why Intermittent Fasting can Make You Skinny Fat: How IF suppresses muscle growth, dysregulates cortisol, tanks testosterone & creates the exact body composition you’re trying to avoid.
TRAINING DEEP DIVES
How to Build an Elite Gas Tank: The 5-pillar system for VO2 max development, with Ultraman World Champion Iñaki de la Parra.
Bodybuilding is a Complete Waste of Time after 3 Years: The shocking truth about why the fitness industry's most popular training method is low ROI.
How Jump Rope Rewires Your Body to Become Lethal: The 8 critical adaptations jump rope creates & why every man should jump rope.
How to build your own Batcave: The ultimate home gym guide to curate your own Bruce Wayne batcave.
Does cardio KILL your gains?: Why the cardio-kills-gains myth is keeping you weak and how strategic conditioning actually enhances muscle growth.
LETHAL MINDSET & LIFESTYLE
How to be a Modern Renaissance Man: A guide to pursuing diverse challenging experiences across multiple domains (physical, cultural, skill-based).
Why Fatigue is the Optimal State of Man: Physical exhaustion through intense exercise and manual labor is the key to overcoming procrastination.
How to be a Professional: Why professionalism is the rarest trait in 2025 and how to develop it through being a man of action.
How to be in the Prime of your Life Forever: How each decade offers unique advantages when leveraged strategically, from 20’s all the way to 60’s.
How to Train to Live, NOT Live to Train: Build “Fuck You Health”, the physical capability that lets you say yes to adventure, opportunity & experience.
How to Design a Lifestyle Where Opportunities Come to YOU: Stop chasing deals, connections & women. Build in-person and online ecosystems where opportunities flow to you organically.