Flexibility refers to the range of motion you can stretch, passively or actively, a muscle before it snaps off the bone and hits you in the eye. More or less.
Mobility refers to the range of motion you can use a muscle effectively.
Here is side-by-side comparison of a female yogi demonstrating flexibility, and a ridiculously photogenic weightlifter demonstrating mobility:
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| Side note: a google image search for "flexibility" is the closest thing to porn you will see with safesearch still on. |
Both of these girls have great hip, knee, and shoulder range of motion. The one on the right, however, is going to stand up with a big weight at the bottom of her position. She is demonstrating mobility. The girl on the left has "gotten into position" by pulling her hip past the point where it ceased being strong for the sake of a stretch. She exhibits great flexibility.
Think of flexibility as a bucket, and mobility as the water you have available to fill that bucket.
Now, I'll be the first to admit that I think flexibility and mobility work are both hella-boring. I'll also admit that I get jacked up something fierce when I stop stretching and mobilizing, so I understand that these are the raw broccoli to my weightlifting's tender juicy steak.
And while the two are not the same thing, they are both, unfortunately, important.
Increasing your flexibility changes the resting length of the muscle and makes them less resistant to being pulled to the end of its range of motion. This is usually touted as a great means of injury prevention. And it is....but not by itself. In fact, flexibility without mobility may increase the likelihood of injury by making it easier to get into positions in which you are not stable. 5 gallons of water in a 10 gallon bucket is just a lot of wasted bucket.
Increasing your mobility, on the other hand, makes you more capable of moving effectively through a large range of motion. Look again at the ridiculously photogenic weightlifting lady above: she's not only showing better flexibility throughout her shoulders, hips, knees, and ankles than most people, but she's supporting a heavy weight in a fairly stable manner at the "edges" of her range of motion. That is good mobility.
I know it sounds like I'm trumpeting mobility over flexibility... and I am. But mobility is certainly enhanced by flexibility, and the latter can aid in releasing chronically tight muscles that are the cause of a pantheon of non-weight training related injuries.
So when should you be working on these qualities?
Mobility work should be a staple in your warm up, and not just limited to what muscle groups you plan on working out that session. Hip, knee, ankle, and shoulder mobility work can and should be a daily occurrence. Don't know how? Why, here's a video, free of charge!
https://www.youtube.com/watch?v=7L5KVw2Pwic
Flexibility work can be done literally anytime, ever. Before your workout, after your workout, or my recommendation, on a completely separate day from weight training as part of a recovery protocol. Taking a yoga class has become my favorite way to incorporate stretching into my fitness routine. The common myths about stretching before workouts decreasing strength, or stretching after workouts to take advantage of pliability, are largely untrue. But that's another article.
Hopefully you know just a little bit more about these terms than you did before.As always, if you have any questions about this article or any other, please leave a comment or send me a message on Facebook. And if you haven't liked our page at Skape Fitness yet, we're totally not friends anymore.
Go forth, mobilize, and lift heavy things.
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