A recent study has concluded that manual therapy techniques applied to the sub occipital region (base of the skull), for as little as four weeks, offered a positive improvement in quality of life of people suffering with tension-type headache.
A tennis ball is a handy tool that you can use in the self-treatment of knots in your muscles, technically known as trigger points. Too many trigger points is known as myofascial pain syndrome.
I personally could not live without my collection of tennis balls. I often refer to Pain Science.com if I’m looking for an eloquent explanation as to why or how something works. What follows is a very useful article as to how you can use a tennis ball to relieve knots in your muscles.