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What is Mobility? How Do We Improve It?

Updated: Sep 1, 2022

Mobility is the ability to move through wide ranges of motion with control. The "with control" part of that definition is important. It's what differentiates mobility from flexibility.


What is flexibility? Flexibility is the ability to move through full ranges of motion. There is no "control" component to flexibility, but that doesn't mean flexibility isn't important. Let's dive deeper...

A lot of us lose flexibility when we spend too much time being inactive (sitting at a desk, commuting to and from work, etc). Our bodies adapt to the positions we stay in the most. If, for example, we sit with a slouched posture multiple hours a day, eventually we lose the ability to sit or stand up straight and keep our shoulders back because our body has adapted to that slouched posture position.

We can improve our flexibility in the same way we made it worse... by allowing our body to adapt to a new position. The only difference is, this time we will be getting our body to adapt to good posture instead of slouched posture. 

How can we do this? Stretching. Stretching can be done in many ways: dynamic stretching, static stretching, partner stretching, PNF stretching, etc. How and when to do each of these styles of stretching is a topic of discussion for another time. What's relevant to mobility improvement is to understand that stretching is the method by which you will get your body to adapt to new positions that will allow you to move with more range of motion.

If your goal is to increase your flexibility, you have to stretch A LOT. How much is a lot? In my experience, you won't make a lot of progress without stretching very thoroughly (at least 30-60 seconds each side if we're talking static stretching) and with intention (not just zoning out while sort of holding a stretch) at least once/day. If you're looking for major progress, you should probably stretch 2-3 times per day. This also happens to be most physical therapist's recommendations for stretching frequency, which makes sense because they are trying to bring your body back to balance and alleviate your pain as quickly as possible.

Here's a thought experiment... We were all kids once. We used to be a lot more flexible than we are now. How much time do you think you spent/spend in the body position(s) that got you to your current level of tightness? It seems foolish to think that we can undo all of that time by going to a stretching class once or twice/week. Remember, our body adapts to the positions we stay in most.


Flexibility is great, but it isn't the end goal. Remember, mobility is the ability to move through wide ranges of motion with control. Having flexibility without control can be risky. Attempting to use our newly acquired flexibility by doing something like lifting a couch could be a recipe for an injury because it requires lifting something heavy in a body position that we don't have control over yet. So how can we gain control over our newly acquired ranges of motion?

The answer is strength. But not just any kind of strength... strength through full range of motion. That means instead of squatting to an arbitrary depth, you should squat as low as you can while keeping your spine rigid. It is important to note that range of motion is relative to the individual. Your appropriate squat depth might be different than my appropriate squat depth. The idea is to train your body through through your full range of motion.

Our risk of injury is lowest when we move through ranges of motion over which we have control. If we can do resistance training though full range of motion, we will be training our body to have control through full range of motion and therefore reduce our risk of injury when we move through full range of motion in every day life.

The Takeaway

Improving our flexibility gets us halfway through the journey toward better mobility. Resistance training through full range of motion is what completes the journey to greater mobility. 

Getting your body to adapt to something new requires stimulus. That stimulus needs to be a loud and frequent signal to the body saying, "this our new normal... lets change to be better at it." If we can communicate that message to our body with stretching and resistance training through full range of motion, it is surely to reward us with better mobility and a lower risk of injury

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