what causes tight muscles in neck
Causes Of Tight Muscles In Neck And Shoulders. 1  Sporting activity: people who play sports such as tennis, badminton or athletes are susceptible to muscular strain and injury. Sport activities where the use of neck and shoulder muscle is more can lead to pulling of such muscles. Overstretching can cause spasm and restricted movement of neck and shoulder. Poor posture: neck and shoulder tightness is also a reason of poor posture. Sitting in front of a computer for long hours can put stretch and strain on muscles of shoulder and neck.