STRENGTH,
CNS & DEADLIFT

Most people treat strength as one thing. It's not. There are four distinct types. Each one has a different purpose, a different training method, and a different athlete who excels at it. Know which one you're training.

Four primary types cover most of your training. But the full picture includes more specific expressions of strength. You'll develop most of these by accident when training the Big 4.

Strength is built in phases. Each phase targets a different adaptation. You can't run all phases at once. Pick one, run it for weeks, then progress to the next. This is periodization.

Your CNS is your brain and spinal cord. It controls every movement you make — voluntary and involuntary. The motor cortex plans and executes your lifts. Repetition builds motor patterns. That's what "muscle memory" actually is — it lives in your nervous system, not your muscles.

The CNS is also why your first sessions after a break feel clumsy, then suddenly you're lifting your old numbers again within weeks. The strength was always there. The neural drive just needed reconnecting.

Left: dissected human nervous system. Right: full CNS mapped across the body.

This is different from normal muscle fatigue. Normal fatigue clears in a day or two. CNS fatigue is deeper. It comes from too much high-intensity work with not enough recovery. Motor neurons fire too often, too fast — and they wear out.

When it hits, your nervous system stops sending strong signals. Lifts feel heavy at weights that used to feel easy. You stop building muscle. Performance drops. You feel it before you understand it.

CNS fatigue dissipates first — muscle damage recovers second. Train in the wrong window and you get nothing.

You wake up your nervous system before a session the same way you warm up a car engine. Low intensity first, then explosive, then lift. This is called Post-Activation Potentiation (PAP) — the process of priming your motor neurons to fire harder and faster before your working sets.

The deadlift is the most honest strength test there is. You pick a bar off the floor. No momentum. No machine. Just you and gravity. It trains the entire posterior chain — lower back, glutes, hamstrings — plus grip, upper back, and core simultaneously.

There are two main styles. Neither is universally better. Your anatomy, mobility, and goals decide which fits you. Most beginners should start with sumo.

Style 01 Conventional

Stance: Feet hip-width apart or narrower. Hands outside the knees.

Torso: More forward lean. Hips higher relative to sumo.

Range: Larger range of motion. Bar travels further.

Primary: Lower back + hamstrings. More spinal load.

Best for: Advanced lifters building raw posterior chain strength.

Style 02 Sumo

Stance: Wide — significantly outside hip width. Hands inside the knees.

Torso: More upright. Hips lower and closer to the bar.

Range: Shorter range of motion due to wide stance.

Primary: Glutes + adductors + quads. More balanced muscle use.

Best for: Beginners, lifters with hip mobility issues, anyone with lower back history.

Grip fails before the back does. Know your options so grip isn't the limiting factor on heavy pulls.

A lifting belt does not protect a weak core. It gives a strong core something to brace against, which allows you to generate more intra-abdominal pressure and support higher spinal loads. The belt amplifies existing strength. It does not create it.

If you wear a belt because your back hurts without it — you have a weak core problem, not a no-belt problem. Fix the core first.

RPE is a 1–10 scale of perceived exertion. It lets you regulate training intensity without needing a 1RM percentage for every session. Used across every section of this book — know it well.