More than 300 male and female participants were asked to look at four computer-generated images of the same man — everything remained the same except for his neck muscles.

Whiplash is a series of neck injuries that occur as a result of the sudden distortion of the neck, ... experts believe it is because women’s neck muscles are usually not as strong as men’s.

Neck muscles can feel tight for many reasons. Some common causes of neck pain are poor posture, physical strain on your muscles, mental stress, and aging. How do you fix a stiff neck muscle?

Nazarian, also a professor of orthopedic surgery at Harvard Medical School, told Popular Science that when neck knots—or myofascial trigger points—occur, “a specific portion of the muscle ...