A strong core has been “in” for years. But the biomechanic awareness that has trickled into yoga and fitness studios has been affected by loads of misinformation and the “quick-build” mentality. Unfortunately, this can often do the body more harm than good.

A brief unauthorized biography of the core

1) The six-pack: It is commonly known now that doing excessive crunches might build a  stronger rectus abdominis (the six-pack muscles), but the action of curling the spine repeatedly can ravage the back muscles and damage precious vertebral discs.

2) Navel to spine: Pilates introduced the transverse abdominal (TA) muscle into our vocabulary. We were told that this would protect our backs, as the TA acts like a cummerbund to pull in sagging guts and make us look like we’re wearing Spanx! The problem with pinning the navel to the spine is that students will often flair their ribs out to make the “appearance” of the navel drawing in the spine. But this actually creates a stretch and weakening of both the TA and the obliques!

3) Side bends: The obliques are often misrepresented as the ubiquitous “side-bending” muscle. They are actually two layers of diagonal abdominal muscles that are like crisscrossing sashes spiraling around our midsections. But biomechanically, the obliques are not all that functional in a side bend. It’s the quadratus lumborum, a deep lower back muscle, that is chiefly responsible.

So when reviewing this partial list of core muscles, it’s clear that they all need a new public relations firm in order to get firm — while keeping you safe! These fabulous muscles have been stripped of their dignity, oversimplified and reduced to dysfunctional, unintegrated tissues. Yes, making your core muscles actually think while they work can be hard work, but the payoff is a sounder structure that will support you for a lifetime!

3 core exercises that help your muscles think

Here are three great Yoga Tune Up® abdominal exercises that wake up and strengthen all of the major core muscles and more:

1) Corset Contraction: diaphragm, intercostals, TA, obliques, rectus, spinal erectors

Stand upright with good posture and place hands on either side of the ribcage. Inhale fully into the lungs with an expansive thoracic breath. Feel the spreading and flaring of the ribs as the external intercostals contract and the internal intercostals stretch.

Exhale and close down the ribs by tensing and contracting the internal intercostals to reset the ribcage. Intensify the end of the exhalation by drawing the bottom of the ribs down toward the navel and creating a binding action all throughout the midsection.

Continue to exhale until no breath is left, as if the whole torso were being corseted. Feel the blending of the internal intercostals with the obliques, transverse and diaphragm.

Practice eight to 10 complete rounds.

2) Megaplank with Active Serratus: rectus, obliques, TA, intercostals, serratus anterior (a shoulder-core muscle), pectoralis

Mega Plank with Active Serratus will strengthen your core from armpits to pelvis!

Mega Plank with Active Serratus will strengthen your core from armpits to pelvis!

The forearms are parallel to each other, shoulder-distance apart. Shoulder sockets are vertically joint-stacked over elbows.

Body is stiff as a solid board, while belly inflates slightly to ignite the abdominals into full tension.

To activate the serratus anterior, protract the shoulder blades by pushing the ground away while the upper back hunches, then depress the shoulder blades as if pulling a window shut while the arms remain pinned to the floor.

Maintain all actions at once. Hold for about 30 seconds.

3) Jithara Parivartonasana (revolved abdominal pose): obliques, TA, iliopsoas, quadratus lumborum, spinal erectors

Revolved Abdominal Pose A

Lay supine on a mat. Arms reach out to your sides like a “T,” with palms pressing into the floor. Keeping the thighs pinned together, legs stretch toward the ceiling stick straight (or slightly bent if hamstrings are tight). Inhale and glide the pelvis to the right about 20 to 30 degrees (fig. A).

Revolved Abdominal Pose B

Exhale as the waist twists and the legs descend toward the left hand, thighs maintaining a 90-degree or more acute angle with the torso at all times (fig. B). The legs do not touch the ground, and they hover during a new full inhalation.

Exhale and return the legs to face the ceiling, unwinding the core. Inhale and repeat on left side.

Do at least four complete rounds, and add one more round every practice.

Take your time with these exercises and coordinate your breath with your movements. Your abdominals are smart but also need you to think, so show them that you really care!

Check out Coregeous to strengthern your core.

Find one of our Yoga Tune Up classes near you.

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Jill Miller

Jill Miller, C-IAYT, ERYT is the co-founder of Tune Up Fitness Worldwide and creator of the self-care fitness formats Yoga Tune Up® and The Roll Model® Method. With more than 30 years of study in anatomy and movement, she is a pioneer in forging relevant links between the worlds of fitness, yoga, massage, athletics and pain management. She is known as the Teacher’s Teacher and has trained thousands of movement educators, clinicians, and manual therapists to incorporate her paradigm shifting self-care fitness programming into athletic and medical facility programs internationally. She has crafted original programs for 24 Hour Fitness, Equinox, YogaWorks, and numerous professional sports teams. She and her team of 500+ trainers help you to live better in your body with an emphasis on proprioception, mobility, breath mechanics and recovery. She has presented case studies at the Fascia Research Congress and International Association of Yoga Therapy conferences. She has the rare ability to translate complex physiological and biomechanical information into accessible, relevant moves that help her students transform pain, dysfunction and injury into robust fitness. Jill is the anatomy columnist for Yoga Journal Magazine and has been featured in Shape, Men’s Journal, Good Housekeeping, Women’s Health, Yoga Journal, Self, and on the Today Show and Good Morning America. Jill is regularly featured on the Oprah Winfrey Network. She is the creator of dozens of DVD’s including Treat While You Train with Kelly Starrett DPT and is the author of the internationally bestselling book The Roll Model: A Step by Step Guide to Erase Pain, Improve Mobility and Live Better in your Body. Based in Los Angeles, CA, she is a wife and mother of two small children and is currently writing her second book.

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Alyson Wish

When the sole aim of our practice is about attaining mythical, flat, washboard abs, our abdominal cavity, and also our capacity for self-love, are stripped of their dignity. These exercises surely make students work smarter—not harder, with no back strain. Students (myself included) feel a new kind of burn performing these YTU poses that awaken core awareness and help “propriocept” what muscles are overworking or compensating for weakness. Thanks for the reminder that strong abs involve more than the rectus abdominus and necessitate a conversation between many torso muscles working in unison on the front, sides, back, top, and bottom… Read more »


Well put, the abs “story” became so obsolete. Will integrate the above moves to my routine, thank you!

Jasmine Ellemo

These are such effective exercises. I am in the middle of the Level 1 Certification with Todd and I have awakened my core, like never before doing these. Playing tennis this morning I was so more aware of my core. I really like that it is not necessary to do oodles of reps to feel the difference. I will incorporate them into my repertoire and add them to the toolbox!


I was looking for a quick core sequence post workout and this is perfect! 🙂

Kimberly Greeff

Every time I read these blogs I learn something new! I really appreciate your break down of “A brief unauthorized biography of the core” Understanding how clients can “cheat” navel to the spine by flaring the ribs and actually stretching the TA instead of strengthening it is so helpful in further understanding this cue. I also appreciate YTU core strengthening and spine stabilization so much more. Revolved Abdominals have changed my relationship to my core so much. When I first attempted these. I could not stabilize my pelvis in order to turn on the QL. It wasn’t just me –… Read more »


All 3 of these are awesome! And I definitely did not realize that cuing the navel to the spine makes the ribs pop up!