Conor Harris Profile picture
Aug 6, 2025 10 tweets 4 min read Read on X
95% of people with “weak” or “underactive” glutes just simply don’t know how to train them properly.

So they do endless glute activation drills to try to fix it, when in reality they just need the right cues.

Here’s a fool-proof guide to feel your glutes properly engage 🍑💪🏼 Image
To get a muscle to contract powerfully, it first needs to be fully lengthened.

For the glutes, this means getting a deep stretch through hip flexion, such as a hinge:
Let’s break it down:

Your glutes attach to the back of your pelvis.

As you descend into hip flexion (like during a deadlift), they lengthen.

That stretch, especially with internal rotation of the hip, primes them for activation.
This is why exercises like:

✅ Bilateral deadlifts
✅ Single-leg RDLs
✅ Split stance hinging drills

…are far more effective for glute activation than banded side steps or clamshells.

Because they load the glutes in a lengthened position.
So the key is to get a nice stretch in the glutes to create:

✅ Hip Internal Rotation
✅ Hip Flexion

So that way you can use the glutes in their role to contract and create:

✅ Hip External Rotation
✅ Hip Extension
Here’s my all-time favorite glute activation drill that uses this exact principle 👇

Split-Stance RDL with Rotation

It’s highly effective AND adjustable to your hip mobility.

Start with just body weight - you’ll feel it immediately.Image
✅ How to do it:

•Slight split stance: 90% weight on front leg
•Back toes lightly touching for balance
•Knees bent ~15–20%
•Slight torso rotation toward front leg (zipper line toward stance leg)
•3-point (tripod) foot contact
Now, slowly hinge forward over that front leg

👉 Keep the same knee bend and heavy on front leg
👉 Stop when you feel a 3/10 stretch in the glute. Don’t go down more than this
👉 Push your foot through the earth to come up rather than trying to just stand up or lock out your knee
🔁 Repeat.

Done right, this will light up your glute like few other exercises.
Even just bodyweight is enough if your mechanics are dialed in.

I have never had someone not feel their glutes a lot if they do this properly.
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More from @Conor_Harris_

Jan 21
The reverse plank might be the single most underrated exercise for fixing slouched posture (thoracic kyphosis).

Why?

Because it addresses the real underlying issues at both your shoulders and hips.

Here’s why it works, and how to do it 🧵 Image
Most people think “fixing posture” is about pulling your shoulders back.

That’s not the case.

Slouched posture often stems from:
•Limited hip extension - the ability to get the legs under us properly
•Limited thoracic extension - secondary to a tight front ribcage
The reverse plank fixes these by:

✅ Driving hip extension with the glutes & hamstrings
✅ Moving your arms behind your body into extension
✅ Opening the chest & elevating the sternum
✅ Restoring front-side ribcage expansion
Read 10 tweets
Sep 3, 2025
The Tibialis Posterior is one of the most underrated muscles for fixing knee, ankle, and foot pain.

Weakness here shows up in countless injuries - yet most rehab overlooks it. Let’s break down why it matters & how to train it 👇 Image
1️⃣ Why it’s so important
Research links a weak tibialis posterior to ankle & foot pain.

This muscle originates on the back of the shin and runs behind the medial ankle, under the foot. Its unique position makes it essential for arch control.
2️⃣ Controlling pronation
When your foot hits the ground, the arch naturally lowers (pronation).

The tibialis posterior decelerates this motion so it happens in a controlled, healthy way. Weakness = arch collapses too far, too fast.
Read 10 tweets
Sep 1, 2025
Struggling to squat deep without buttwink or your back rounding?

Most people blame it on ankle mobility… but that’s only part of the story.

Here’s what you need to know to fix your squat at the root cause 🧵 Image
The real question: why is ankle mobility limited in the first place? Image
One underrated reason 👉 Your body’s center of gravity is shifted forward.
Read 12 tweets
Aug 29, 2025
Most people are missing one key piece of hip mobility.

And if you don’t have it, your low back is the one paying the price.

Let’s talk about hip extension 🧵 Image
Hip extension = your ability to bring your leg fully under you and slightly behind you.

It’s one of the most commonly limited motions I see when assessing clients. Image
Why does it matter?

If you can’t extend at the hip, your body will find a workaround:

👉 Arching the low back instead.
This creates repetitive stress on the spine.
Read 9 tweets
Aug 25, 2025
Most people think Sciatica is caused by a tight piriformis muscle.

But the piriformis is usually just the messenger, not the root problem.

Here’s what’s really going on (and how to fix it)… 🧵 Image
Most people with sciatica think the issue is their piriformis muscle being too tight and pressing on the sciatic nerve.

So, they stretch it or roll it out for temporary relief…

But that tight piriformis is usually just a symptom of something bigger. Image
The real problem often starts with your body’s center of gravity shifting forward. This is what I commonly see in my clients with Sciatica.
Read 13 tweets
Aug 20, 2025
One of the most overlooked culprits in stubborn low back pain?

👉 The Quadratus Lumborum (QL).

It’s tight, overactive, and pulling your spine out of balance more often than you think.

Here’s why it matters and how to fix it 🧵 Image
First, it’s key to understand that the QL runs between your pelvic crest and lowest rib. Image
When it gets short and tight, it has 2 main effects:

•Both sides: compress + extend your low back (arching)
•One side: side-bend the spine, pull the shoulder down + hike the hip up
Read 11 tweets

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