The Lethal Gentlemans Club

The Lethal Gentlemans Club

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The Lethal Gentlemans Club
The Lethal Gentlemans Club
The Lethal Core Protocol
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The Lethal Core Protocol

How to Build an Aesthetic & Durable Core & Mid-section.

Jack Krucial's avatar
Jack Krucial
Mar 23, 2025
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The Lethal Gentlemans Club
The Lethal Gentlemans Club
The Lethal Core Protocol
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The average man trains their core like a complete imbecile.

1000's of mindless sit ups.

Endless planks that build nothing but ‘mental toughness’.

Some bullshit bodyweight ab circuit they saw on Instagram.

It's not just ineffective for long-term physique development...

It's a waste of your valuable time.

You're a busy man with actual priorities. A man who demands excellence across all domains.

The last thing you need is to spend 30 minutes doing exercises that only train 20% of your core's true capacity.

Here's the fundamental mistake 99% of men make in commercial gyms:

They are only training ONE plane of motion: FLEXION.

Think about it:

  • Crunches: Spinal flexion

  • Sit-ups: Spinal flexion

  • Leg raises: Hip flexion with isometric spinal flexion

  • Planks: Isometric flexion resistance

That's training 20% of your core's movement potential and expecting to build an aesthetic, durable core.

It's like only training your chest and expecting to have a complete physique.

It's like only focusing on sales and wondering why your business is collapsing.

THE SPINE HAS 6 FUNDAMENTAL PLANES OF MOTION

1. ROTATION

The power generator. Whether you're driving a golf ball 300 yards down the fairway or delivering a knockout punch, rotational power combines multiple movement planes into explosive force production.

2. ANTI-ROTATION

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