The core and glutes get a lot of attention — for aesthetic reasons, yes, but also because of their function. The abdominals make up the so-called core of the body, while the glutes are major muscles of the hips that require a strong core to anchor them.
The abdominal muscles that wrap around the torso provide structural support in all we do. While we run, lift, jump, and lie in savasana, the core helps protect the spine, allows for rotation and antirotation of the body, and encourages full, deep breaths. Meanwhile, the glutes coordinate with the muscles of the core to help the body move efficiently.
The focus on the abs and glutes has nearly evolved into an obsession, says performance coach Greg Roskopf. It emphasizes a continual hyperarousal of our hips and midsections as we constantly strive to brace, engage, activate, or otherwise fire our belly and butt muscles.
But for all this squeezing and clenching, our glutes and abs aren’t much better off. “Those are the areas where I most often find neurological weaknesses,” says Roskopf, who helps professional athletes properly activate lagging muscle groups. Extra tensing and tightening can impair otherwise good form, inhibiting progress and potentially causing discomfort or injury.
Our muscles are used most efficiently when they can turn “on” and “off,” to use common fitness jargon. In other words, there’s a time for tension and a time for relaxation.
Educating yourself about body mechanics and developing awareness of your unique body are the best ways to practice putting your abs and glutes to optimal use.
There was a time when the terms “abs” and “glutes” weren’t even part of the fitness lexicon. Things have certainly changed: Most exercisers these days know that the core is more than a six-pack of superficial musculature. It is a girdle of muscle — three layers thick — that surrounds your waist, including:
Together, the abdominal muscles bend, rotate, and fold your torso forward, back, and to the sides. Perhaps more important, they also help resist unwanted torso movement, thereby protecting your spine from excessive movement and injury. (Learn more about the core at “How to Create a Strong Core”.)
Various other smaller muscles in the hips and back contribute to stability through the torso.
The glutes have similarly important functions. They consist of three major muscles:
The glutes extend your legs — pulling your thighs backward when you run, for example. They also pull your legs away from your centerline and rotate them outward. When they work properly, the glutes help stabilize your knees and lower back. (For more on glute and hip function, check out “Healthy, Happy Hips”.)
Over time, back pain, hip inflexibility, and inactivity may inhibit and weaken the abs, glutes, or both. That’s why learning to activate these muscles properly can be an important early step to restoring correct functioning, particularly if you’re returning to exercise after injury or taking a break. (Find more advice on returning to exercise at “5 Ways to Get Your Fitness Routine Back on Track”.)
There’s nothing wrong with a little flexing. But problems can arise during your workouts when you unnecessarily clench your muscles.
“The most efficient movement is one without extra tension,” explains Roskopf. Consciously contracting additional muscles introduces tension that throws off the smooth execution of the movement — and sometimes makes the exercise harder.
Let’s say you’re doing a plank, the pushup-hold that’s long been a core-building staple. If you do it correctly — body straight; back in its natural arch; hips in line with your head, heels, and upper back — your core is already engaged. There’s no way around it.
But if you overemphasize squeezing your glutes while doing a plank, you’ll turn an effective move into an exercise in unnecessary strain.
“If you fire the glutes without connection to the rest of your core, then you are leaving out the most important part of the exercise,” says Sonja R. Herbert, founder of Black Girl Pilates, a collective for Black female-identifying instructors.
The adductors (inner thighs), abductors (outer thighs), and the transverse abdominis all contribute to proper plank form, explains Herbert. If you overemphasize the glutes, the center of your plank will warp to the floor.
The lesson here is to focus on alignment and let your muscles do the work in the best position for your body, she adds, rather than trying to force the muscles to work as hard as they can.
Consider the plank example the next time you do a deadlift or kettlebell swing: At the top of these exercises, do you squeeze your butt so hard that your hips swing out in front of you? This is a common error that not only doesn’t improve strength and power but can also harm the lower back.
The correct alignment calls for full extension — but not hyperextension — of the hips and knees, with ribs and shoulders stacked directly over the hips. In this position, the glutes will engage to facilitate hip extension; the abs will engage to keep the bottom ribs down, not flaring out.
This guidance might be especially useful for those who say they can’t feel their muscles working, says Roskopf. By focusing on alignment, you can count on the fact that your muscles are there for you — even if you’re just starting to build your awareness of them.
Learning proper form across different exercises is a great way to improve alignment and develop body awareness.
You can do this by choosing exercises that activate the correct muscles automatically. Moves like the hip thrust, stability-ball kickback, and windshield wipers are good examples. They’ll give your glutes and abs plenty of work without requiring you to squeeze or clench.
Want to give your muscles an extra squeeze at the top of a move for good measure? Go for it — but don’t contract and flex when you don’t have to, and don’t call on muscles that don’t contribute to the proper execution of the move.
This article originally appeared as “Getting Engaged” in the March 2021 issue of Experience Life.