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Your 'Wide Ribcage' Isn't Wide—Your Back Is Underdeveloped

You've blamed your 'wide ribcage' for your lack of waist. You've accepted being 'boxy' as genetics. But the shape you're seeing isn't about bone—it's about muscle you never built.

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Coach Pink

Founder, PrettyPinkStrong

January 26, 20268 min read

You've looked at yourself in the mirror and thought: "I have no waist."

Your torso goes straight down from under your arms to your hips. There's no curve. No indent. No hourglass. Just a rectangle where you wish there was shape.

You've blamed your ribcage. "My ribs are just wide," you've told yourself. "It's genetics. I'm just built boxy."

Here's what nobody told you: Your ribcage probably isn't unusually wide. Your back is unusually underdeveloped. And that changes everything about what's possible.

The Proportion Problem

The appearance of a small waist isn't determined by waist size alone. It's determined by contrast—the relationship between waist and what's above and below it.

A 28-inch waist looks tiny on a woman with 40-inch shoulders and developed lats. The contrast creates the visual of dramatic curves.

A 28-inch waist looks "boxy" on a woman with 34-inch shoulders and no lat development. There's no contrast. The torso is straight up and down.

Same waist. Completely different appearance. The difference isn't waist size—it's upper body development creating (or not creating) the taper above it.

Most women who think they have a "wide ribcage" don't actually have unusually wide ribs. They have:

  • Narrow, underdeveloped shoulders
  • Flat, underdeveloped lats
  • Poor posture that collapses their chest and rounds their shoulders

The ribcage looks dominant because nothing else creates contrast. It's not that the ribs are wide—it's that the muscles around them haven't been built.

Note

True skeletal width variation exists, but it's much smaller than people assume. Most "wide ribcage" complaints are actually underdeveloped upper body muscle complaints. The ribs are a scapegoat for what's really missing.

The V-Taper You're Missing

Look at any woman with a dramatic waist—fitness competitors, athletes, women who lift. What do you notice?

Wide shoulders. Their deltoids create width at the top of the torso. This isn't bone—it's built muscle.

Developed lats. Their latissimus dorsi create width just below the armpits. From the front, this creates a dramatic taper toward the waist. From the back, it creates the V-shape.

Developed glutes. Below the waist, their hips and glutes create width that contrasts with the waist from below.

The waist exists between upper body width and lower body width. Without that width above and below, the waist has nothing to contrast with. It doesn't look small—it looks like everything else.

The pattern I see constantly: A woman with no lat development, narrow shoulders, and flat glutes complains about her boxy torso. She tries to shrink her waist through dieting. Nothing works. Her waist gets smaller, but so does everything else—the proportions stay identical.

She's trying to create the illusion of curves through subtraction. It doesn't work. The illusion requires addition.

Coach's Note: If you can wrap your hands around your own back and touch your fingers together without much difficulty, your lats are likely underdeveloped. Developed lats create width that prevents this.

Why Women Don't Have V-Tapers

If the V-taper is so impactful, why don't more women have one?

Women are told not to build upper body muscle. The fitness industry tells women to avoid getting "bulky" and focuses them on lower body work. Most women do minimal back and shoulder training with minimal resistance.

Upper body training requires intentional effort. Your legs get worked just walking around. Your back and shoulders don't. Without deliberately training them, they don't develop.

Underdeveloped upper body = underdeveloped taper. When the only muscle women build is in their glutes (because that's what social media tells them to prioritize), the upper body stays flat. The torso looks boxy because it literally is—all the development is below the waist.

Poor exercise selection. Even women who do some upper body work often do the wrong exercises—light weights, high reps, exercises that don't build mass. Lat pulldowns with 30 pounds don't build lats.

Pro Tip

You cannot build a V-taper with light weights and high reps. The muscles that create width—lats and shoulders—require progressive overload and actual challenging resistance to grow.

Building The Taper

If you want to transform your torso from rectangular to V-shaped, here's what you need to build:

Latissimus Dorsi (Lats)

These are the muscles that create width below your armpits. When viewed from behind, they create the V-shape. From the front, they create the taper toward your waist.

Exercises that build lats:

  • Pull-ups or assisted pull-ups
  • Lat pulldowns (heavy)
  • Cable rows
  • Single-arm dumbbell rows
  • Pullovers

The key is progressive overload. You need to be lifting weights that are actually challenging—not the 30-pound lat pulldown that every woman defaults to.

Shoulders (Deltoids)

Your deltoids create the cap at the top of your arms and the width at the top of your torso.

Exercises that build shoulders:

  • Overhead press
  • Lateral raises
  • Face pulls
  • Rear delt work
  • Arnold press

Shoulder development is often neglected by women. Building visible delts creates the top of the V that makes everything below look smaller.

Upper Back (Traps, Rhomboids)

These muscles create thickness through your upper back, contributing to the three-dimensional shape that makes the V-taper dramatic.

Exercises that build upper back:

  • Rows (all varieties)
  • Face pulls
  • Shrugs
  • Reverse flyes

Building The V-Taper

  • Train lats 2x per week with heavy, progressive resistance
  • Build shoulder width through overhead pressing and lateral raises
  • Include rowing movements for upper back thickness
  • Use weights that challenge you—not token light weights
  • Be patient—upper body development takes 6-12+ months
  • Stop blaming bone structure for muscle you haven't built

The Transformation Example

A woman in her late 30s came to me convinced she could never have a defined waist. "My ribs are just wide," she said. "I've always been boxy."

I looked at her frame. Her ribcage was normal. Her shoulders were narrow. Her back was flat. She had zero lat development.

"Your ribcage isn't the problem," I told her. "Your back is."

We spent eight months building her upper body. Pull-ups (progressively, from assisted to bodyweight). Heavy rows. Overhead pressing. Lateral raises. Actual weight, not tokens.

She gained 6 pounds. Her waist measurement didn't change at all.

But her appearance? Dramatic transformation. She finally had a V-taper. Her shoulders created width. Her lats flared below her arms. Her waist looked small because now there was contrast above it.

"I can't believe I spent thirty years thinking my bones were the problem," she said. "I just never built the muscles that create shape."

The Proportions Game

Here's the truth about body shape: Most of it is proportion, not absolute size.

A woman with a 30-inch waist and narrow, underdeveloped everything looks boxy. A woman with a 32-inch waist and developed shoulders, lats, and glutes looks curvy.

The second woman has a larger waist. She looks more tapered because of proportion.

Stop trying to shrink your waist into looking small. Start building the muscles above and below it that create contrast. That's how tapers are made.

Your ribcage isn't wide. Your perception is shaped by what's around it. Build the frame, and suddenly that ribcage is a normal part of a dramatically shaped torso—not the reason you look rectangular.

The Body You Can Build

You're not genetically cursed with a boxy torso. You're just untrained in the areas that would create shape.

The V-taper isn't reserved for competitive athletes or genetic lottery winners. It's built through consistent upper body training that most women have never done.

Build your lats. Build your shoulders. Build the frame that creates contrast with your waist. Watch your "wide ribcage" become irrelevant as the muscles around it transform your shape.

The bones are a fixed variable. The muscles are not. Stop blaming the variable you can't change, and start building the one you can.


If you're ready to build the upper body that transforms your torso proportions, that's exactly what the Pretty Strong method is designed for →. We build the lats, shoulders, and back that create the V-taper—not through light weights and hope, but through progressive overload that produces real change.

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Coach Pink

Founder, PrettyPinkStrong

Strength coach dedicated to helping women build confidence through intelligent training. The Pretty Strong method teaches you how to sculpt your body with skill-based lifting.

P.S. I'm currently accepting applications for the Pretty Strong coaching program. I work with a small number of women each month to provide truly personalized support. If you're serious about building your strongest self, apply here before spots fill →

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