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The Method

CrossFit, explained.
In plain English.

Why CrossFit works. What the method actually is. How nutrition sits underneath it. And why — for everyday people — it produces results no isolated gym or diet program can match.

Chapter 01 · The definition

What CrossFit
actually is.

CrossFit's founder Greg Glassman defined the method in one sentence in the early 2000s. Twenty years on, it still holds.

"Constantly varied, functional movements, performed at high intensity."
— Greg Glassman, CrossFit Journal, 2002
01

Constantly varied

No two sessions are the same. Your body never gets to settle in and stop adapting. Different movements, different time domains, different loads — week after week. Your fitness has to keep up.

02

Functional movements

Squat. Hinge. Push. Pull. Carry. The movements your body was built for. Compound, multi-joint, big muscle groups — the exercises that translate directly to real-world strength and ageing well.

03

High intensity

Intensity is the magic ingredient. Force × distance ÷ time = power. You produce more work in less time. That's what triggers the adaptations — fat loss, fitness, strength — that slow training can't.

Chapter 02 · The 10 skills

Ten skills.
One complete athlete.

Most fitness programs build a few of these and ignore the rest. CrossFit's definition of fitness is being good at all ten, all at the same time. That's why it produces a different kind of result.

01
Cardio Endurance
The engine. Process oxygen efficiently for long efforts.
02
Stamina
Process & store energy. Push for longer without dropping output.
03
Strength
Apply force. Lift heavy. Carry things. The base of every athletic act.
04
Flexibility
Maximise range of motion at a joint. Move without restriction.
05
Power
Strength × speed. The ability to express force fast.
06
Speed
Reduce the time for repeated movements. Move faster, recover faster.
07
Coordination
Combine multiple movement patterns into one smooth action.
08
Agility
Change direction or movement pattern fast and under control.
09
Balance
Control your centre of gravity over its base of support.
10
Accuracy
Control movement in a given direction or at a given intensity.

A typical gym builds 1–3 of these. A typical sport builds 4–6. CrossFit programs all ten — and that's what gives you fitness that translates everywhere.

Chapter 03 · The pyramid

Fitness is
a stack.

CrossFit's Theoretical Hierarchy of Development ranks the layers of physical fitness in the order they should be built. Each level depends on the one below it. Skip the foundation and the whole stack is shaky.

Tier 01 · The foundation
Nutrition
Real food. Real targets. The bedrock everything else stands on.
Tier 02
Metabolic Conditioning
The engine. Aerobic and anaerobic capacity.
Tier 03
Gymnastics
Bodyweight control. Push-ups, pull-ups, squats, balance.
Tier 04
Weightlifting
External load. Squat, deadlift, press, Olympic lifts.
Tier 05 · Apex
Sport
Application — competition, performance.

Why nutrition sits at the bottom.

It's not the most exciting tier. It's the most important. Every level above relies on what you eat to function.

Train without nutrition and you stall. The engine has no fuel, the body can't recover, fat doesn't come off, muscle doesn't go on. Most members who plateau on a generic gym program are stuck because nutrition is broken — not because their training is.

This is why we lead with it. Your first day at Iron Barbell, we set your macro targets, build your meal plan, and lock in the foundation. Then we layer the rest on top.

Chapter 04 · Nutrition

How we build
your nutrition plan.

Nutrition is the most over-complicated topic in fitness. Our approach: two meal types, real food, weighed and measured. Built from your body scan, executed daily. No tracking apps, no calorie chaos.

"Eat meat and vegetables, nuts and seeds, some fruit, little starch and no sugar. Keep intake to levels that will support exercise but not body fat."
— CrossFit nutrition prescription, World-Class Fitness in 100 Words
01 · Built from your data

Macros calculated, not estimated.

Your protein, carb, and fat targets are calculated from your actual body scan numbers — lean mass, fat mass, activity level. Not a generic chart. Not a guess. Real targets, in grams, for your body.

  • Protein scaled to your lean body mass
  • Calorie deficit tuned to your training load
  • Reviewed and adjusted every 4 weeks
02 · Two meal types. That's it.

Main meals + light meals.

We don't ask you to count calories at every meal. Instead — two simple meal frameworks you repeat through the day. Main meals carry the protein and most of the volume. Light meals fill the gap. Predictable, repeatable, sustainable.

  • Main meal: lean protein + vegetables + measured starch
  • Light meal: protein-led, quick, simple
  • One prep day a week — Sunday usually
03 · Weighed and measured

A scale on the bench.

Eyeballing portions doesn't work. A kitchen scale on the bench is the single tool that produces the result. Once it's a habit (week 2–3 for most), it stops feeling like work. The food gets repeatable, the numbers get repeatable, the body composition follows.

  • Gram weights, not "a handful"
  • Removes guesswork — and overeating
  • Automatic by week 4
04 · 6 deficit + 1 refeed

Six days strict. One day eased.

Pure dieting forever doesn't work — your body fights it, your hormones drop, training suffers. Six days in deficit, one day at maintenance. The refeed replenishes glycogen, supports hormones, and makes Monday's training significantly better. It's not a cheat day — it's part of the plan.

  • Refeed = controlled carb up, still protein-led
  • Mental relief built into the system
  • Better training the next 6 days
Pre-training
Eat 1.5 – 2 hrs before
Your main meal lands a window before training. Don't train on a full stomach. Don't train on empty. The right window gives you fuel without making you sluggish.
Hydration
~35 ml / kg / day baseline
Plus 500–750 ml extra for every training session. Dehydration silently caps your performance and slows fat loss. It's the cheapest, easiest lever you control.
Chapter 05 · Why it works

For everyday
people. Like you.

Most gym programs are built for one type of person. CrossFit + structured nutrition is built for any human who wants to be fitter, leaner, and stronger — and stay that way. Here's why it works so well.

Reason 01

It's coached. Every session.

You don't have to know what you're doing on day one — a coach watches every rep, scales the workout to your level, and progresses you safely. Most members who fall off generic programs do so because there's nobody actually paying attention to them.

Reason 02

Intensity does the heavy lifting.

A 20-minute high-intensity workout produces adaptations a 60-minute jog can't. You spend less time training, get more results. Crucially, you finish before you have time to talk yourself out of it.

Reason 03

Variety beats boredom.

The biggest reason people quit fitness is boredom. Constantly varied programming kills that. Every session is different. You never know exactly what's coming — and your body keeps adapting because it can't predict either.

Reason 04

The community pulls you back.

Showing up alone is hard. Showing up to a class where people notice if you're missing — that's different. The Iron Barbell community is the thing members say keeps them coming when motivation runs out. Every gym says this. We mean it.

"The needs of an Olympic athlete and our grandparents differ by degree, not kind."
— Greg Glassman, CrossFit Journal

Translation: the same method works for everyone — we just dial intensity and load up or down. Your grandma. A firefighter. A new mum getting back to training. You. Same method. Different scale.

No cost · No commitment · No workout

Book your
free intro.

30 minutes with a coach. See whether the method is right for you — before you commit to anything.

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