Mobility vs Flexibility

I want to clear something up, mobility and flexibility aren’t the same thing.

Flexibility is about range, basically, it’s the ability of a joint, or a series of joints, to move through an unrestricted, pain free range of motion, in simple terms, it’s how far something can go.

There are two main types.

You have static flexibility, which is your ability to reach and hold a position at the end of a joint’s range. That might be passive — using gravity, a stretch strap or band, or having someone assisting you in a stretch — and this is typically done at the end of a training session.

And there’s also dynamic flexibility, which is your ability to move a joint through its full range during controlled movement. Think of leg swings or arm circles. You’re moving through range, but the goal is still how much motion is available. These are more typically used at the start of a session to warm up and prep your body for movement.

But here’s where it can get confusing.

Mobility is different.

Mobility is the ability of a joint to move actively through its full range with control and strength. It’s not just about how far you can be pushed or pulled into a position. It’s about how much of that range you can create and control yourself, it’s more active.

Mobility is being able to get into a position using your own muscle power, without relying on gravity, momentum, or someone else helping you get there.

And it also means your musculature around the joint is strong enough to support it as you get to the edges of its range. So you can actually own the position without straining, and there’s a neuromuscular element too. Your brain has to be able to organise and fire the muscles required for movement.

So if you lie on your back and someone lifts your leg up for you, that’s flexibility.

If you lift it yourself, keep your pelvis steady, control it, and breathe normally — that’s mobility.

For golf it doesn't matter how flexible you are lying on the floor, it matters what you can control while you’re standing, rotating, shifting pressure, holding posture, and swinging a club at speed.

It’s possible that you can be very flexible and still struggle in your swing. Because if you can’t control a movement then your body can’t reproduce it efficiently when things move quickly during your swing.

Essentially, mobility is movement that you own, not just looser muscles.