If You Can Hold a Side Plank This Long After 55, Your Core Strength Is Stronger Than 90% of Peers

Side planks have a way of exposing things pretty quickly. You get into position, lift your hips, and within a few seconds, you know exactly where you stand. It’s not dramatic, but it’s honest. If your core can hold that stacked, controlled position, everything feels steady. If it can’t, you start to feel the shift right away through your hips and torso.

From a coaching standpoint, this is one of the first places I’ll see gaps. I’ve worked with plenty of people who stay active and move well, but once we get into something like a side plank, it tells a different story. They handle forward movement just fine, but resisting side-to-side motion takes more effort. That’s usually where things start to break down. The side plank helps build that missing piece and brings things back into balance.

This is one of the simplest ways to check how well your core supports you in real-world situations. Carrying something in one hand, stepping off a curb, or moving across uneven ground all rely on that side-to-side control. The longer you can h...