10/23/2026
Clamshells get poo-poo’d quite a bit on the interwebs. But they aren’t a bad exercise at all.
The biggest issues I see when they are prescribed to people are:
1. Poor coaching or intent. They just aren’t done very well. The benefit you get from them is going to be pretty small (or nil) if you aren’t doing them in a useful way 🤷.
2. No progression. They just do their clamshells, never adding reps, load, or time to truly progress the ability to fully shorten your glute max.
3. They are already squeezing their glutes all the time. That’s why it’s “weak”. Hard to squeeze a muscle that’s already squeezed. This person needs to learn how to lengthen their glute before they worry about squeezing it again.
Is the clamshell a super important exercise that everybody should be doing or else your going to have knees caving in and hips that are out of alignment forever?
No.
But I think it’s useful as a way to learn how to actually fully shorten your glute without cheating at your pelvis, low back, or lower leg.
If you want to get the most out of your mobility/activation/accessory drills, you have to have some focus on HOW you are doing them.
Your body will always take the easy path. Don’t let it.