Core Training

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Resistance training basics
Core training follows the same rules as the rest of strength training: aim for quality you can hold steady rather than forcing more reps, and add a little time or load each week. The principle of progressive overload does not change just because the target is the trunk.

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What the core is

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The core is not the six-pack. It is the whole ring of muscle around the middle of the trunk, from the bottom of the ribs to the pelvis, shaped like a cylinder.

This cylinder's real job is to steady the spine and pass the force made by the hips and legs up the body. A soft middle leaks force; only a stiff enough middle lets it through. So the core mainly holds the trunk firm and blocks unwanted movement; it is not there to sculpt abs. The rectus abdominis (the six-pack) is only a small part of the cylinder's front wall, and how visible it is depends mainly on whole-body fat, not on how many crunches you do.

In rare cases, back pain comes with numbness in the saddle area (the groin and inner thighs), trouble with bladder or bowel control, or both legs getting steadily weaker. That is an emergency: go to the emergency department immediately.

Educational content, not medical advice — consult a clinician.

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Core Training

Story

Connected to · 1

cofactor · 1

Resistance training basics
Core training follows the same rules as the rest of strength training: aim for quality you can hold steady rather than forcing more reps, and add a little time or load each week. The principle of progressive overload does not change just because the target is the trunk.

Read full story

Stop 1/6

What the core is

EVIDENCEREVIEW 1

READ THE ORIGINAL

The core is not the six-pack. It is the whole ring of muscle around the middle of the trunk, from the bottom of the ribs to the pelvis, shaped like a cylinder.

This cylinder's real job is to steady the spine and pass the force made by the hips and legs up the body. A soft middle leaks force; only a stiff enough middle lets it through. So the core mainly holds the trunk firm and blocks unwanted movement; it is not there to sculpt abs. The rectus abdominis (the six-pack) is only a small part of the cylinder's front wall, and how visible it is depends mainly on whole-body fat, not on how many crunches you do.

In rare cases, back pain comes with numbness in the saddle area (the groin and inner thighs), trouble with bladder or bowel control, or both legs getting steadily weaker. That is an emergency: go to the emergency department immediately.

Educational content, not medical advice — consult a clinician.