Structure holds your shape under load

An hour into a run, the road turns up a steep hill. Halfway up, you start to slouch. Your shoulders round, your head drops, and your chest folds down towards your hips.

Each stride now pushes into something soft. Your middle gives a little with every step, and part of the push from your legs is lost in it.

Your folded chest squeezes your breath, so you pull harder for air and get less. Your legs run short of oxygen and tire fast. By the top you are toasted.

Now picture someone who has built structure with heavy carries and the like. Same hill, same hour in the legs. She stays tall all the way up, chest open, breathing deep.

Every stride pushes against something solid. At the top she feels invincible.

Your legs and hers were much the same. What differed was what they pushed against.

01

Your trunk is one solid block.

From your hips to your shoulders, your trunk is meant to work as one solid piece. Your arms and legs push against it. A stride drives from the ground, up the leg, into the trunk, and the whole body goes forward. That is your core doing its job.

Structure is what keeps that block solid while something pushes on it. It does not twist, sag or fold, so the push from the legs goes into the hill, not into bending you. Its shape is the line from ankle to ear: ankle, knee, hip, shoulder, ear.

A black and white photograph from 1949 of a woman on a building site carrying a heavy hod of mortar on one shoulder. Under the load her back stays long and her chest stays up, one hand steadying the handle in front of her as she walks. — A hod carrier on a building site in Helsinki, 1949. Photo: Eino Heinonen, Helsinki City Museum. Public domain.

02

Solid is not the same as tight.

A solid trunk is not a held breath. On a long hill nobody can brace for ten minutes, and nobody needs to. The block stays solid because you stand tall in your line.

Inside it, the breath moves freely. Your diaphragm, the dome of muscle under your lungs, drops on every breath in, and your lower ribs swing out to make room. A tall trunk leaves that room open. A folded one squashes it.

Researchers in Japan sat 15 healthy men in a chair and had them breathe with their heads pushed forward, then upright. With the head forward, their lungs moved less air, and their lower ribs moved less with each breath. Same men, same chair. Only the posture changed.

03

Tiredness folds you.

Your shape does not go at the start. It goes once you are tired, which is when you need your breath and your push most.

In one study, 20 young women ran 5 kilometres. On another day, they walked 5 kilometres carrying 22.7 kilograms on their backs. After both, they were leaning further forward. Eighteen of the 20 changed the same way.

Riders fold too. Researchers asked 23 amateur cyclists to ride as hard as they could hold for 20 minutes. Their low back held through the middle of the test, then rounded in the last part, and so did their upper back.

04

Structure is built under load.

You build structure the way you use it: by keeping the block solid while something heavy tries to bend it, and breathing as you do.

First you hold. In the goblet squat, you sit deep with a weight at your chest, and the chest stays tall. With a weight locked straight above your head, the ribs stay over the hips.

Then you move with the load. In the get-up, you lower yourself to the floor and stand back up with a weight overhead. The weight stays where you put it, and the body moves underneath it.

Then you walk with it. In the suitcase carry, one heavy weight hangs at your side and pulls you towards it with every step. You walk tall and breathe steadily, and you stop when you start to lean. That is the hill, practised.

A black and white photograph from 1974 of a woman crossing a slushy yard beside a long wooden house, a full bucket of water hanging from each hand. She walks tall between the two weights, shoulders level, towards the steps of her door. — A woman carries two full buckets of water across a yard in Ruoholahti, Helsinki, 1974. Photo: Harri Ahola, Helsinki City Museum. Public domain.

05

The same load gets lighter.

Progress does not start with a heavier weight. It starts with the same weight feeling lighter, and the carry lasting longer before your shoulders drop. That leaves more strength over for the end of a long climb.

Structure grows alongside the other three, not before them or after.

06

Try this.

Pick up one heavy bag of shopping, or a kettlebell, in one hand. Walk with it for a minute. Stand tall, shoulders level, ears over your shoulders, and breathe normally. Do not lean away from the bag or towards it.

Then swap hands and walk back. Notice which side lets you tilt first. That is the side that needs the most work.

What this means for you

Hold a good shape under a heavy load, move with it, then walk with it until your shape goes. Stay with the same load until it feels lighter.

On a short, hard effort, brace. On a long carry or a long hill, do not. Stay tall and breathe, and let the solid block of your trunk carry the push.

Sources

Book

Workouts