There are ten reasons why doctors think your neck and shoulders may be hurting after you run or while you’re running. These range from clenching your fists and causing tension, being tense either from stress or holding your body incorrectly, or possibly even being hydrated.
The ways to fix these problems are simple. Small things like wearing a shirt with thumb holes, drinking plenty of water, and making sure you stretch well and properly before you go running are absolutely key to preventing unwanted neck and shoulder pain.

Read more: 10 Reasons Your Neck and Shoulders Hurt While Running