Most people do not know about the subclavius muscle, but it can be the source of pain in the area of the biceps, your inner forearm or the first three fingers.
A rounded back or desk work can contribute to problems in this muscle.
With trigger points in this muscle, you might feel pain all the way down your arm.
It may even radiate into the thumb and first two fingers. The darker the red in the picture below, the more common it is to feel pain in the respective area when trigger points are present in this muscle.
Hence, this muscle can, among others, contribute to the following pain symptoms.
Click on the just placed links to learn how you can relieve the corresponding pain.
I know of no activities that may be impaired with this muscle being too tight.
Still, it might cause a tight feeling in and around the chest and collarbone and may impair the flexibility of the shoulder.