This is just one of a multi-post series explaining some common massage terms, issues, and situations.
In order to better understand cross-linkages and adhesions it's important to have a
basic understanding of the fascia.
As we age, injure our fascia, or create scar tissue collagen fibers tend to be packed in closer together, and to form more connections.
These connections are called "cross-linkages". Cross linkages reduce the glide and movement of your muscles. Things don't feel as smooth and supple as we'd like!
When those cross-linkages develop between layers of fascia they are called adhesions.
As time goes on and these adhesions or cross-linkages are allowed to remain the collagen fibers will actually
bond between neighboring layers of fascia.
These bonds are what make these neighboring muscles lose their Independence from the adjoining muscles.
So... why does this matter to you?
Well, think of it this way... If you had to drag a bag of sand around with you everywhere, not by choice, you'd expend waaaayyyy more energy than if you were to just be walking on your own. And it could become rather painful. It's the same way for your muscles.
To further complicate matters, often adjacent muscles have similar but different functions. An example of this would be your calves.
People generally know about their gastrocnemius' (gastrocs). It attaches at one end to the back of your heel by way of your Achilles tendon, and splits into two "heads" to attach at the back of the knee to the thigh bone. This means it crosses two joints (the ankle and the knee) The actions created by this muscle are to either flex the ankle (basically to go on tippy-toes)
or to bend the knee backwards.
However, underneath the gastrocs is located the soleus. The soleus attaches at one end to the heel bone and Achilles tendon, just like your gastrocs however it attaches to your fibula (the smaller bone in the bottom part of your leg) and to a bony landmark on your tibia (the bigger bone in the bottom part of your leg). As a result of this muscle only crossing
one joint, it only has one action. It flexes the ankle (again with the tippy-toes!).
I'm sure at this point you're hoping i get to the point soon...
Well here it is... If you have those muscles sticking together, what will happen when you go to bend your knee back? Well, if the soleus is stuck to your gastrocs it could cause that soleus to also be activated and therefore also point your toe.
It's just an issue of your body not being able to move the way it should. This issue can happen between any layer of fascia. Your bones are covered with fascia called periosteum... Think about what it could feel like if you were to have your muscles stick to your bones and unable to glide... why walking would even be painful. Or breathing if it's the muscles between your rib cage sticking to the rib bones!
Stretching helps with reducing adhesions, as does massage. Myofacial release is particularly good at releasing. Thai yoga massage is as well, as the therapist assists the client in stretching.