Worse for females, increased age, severe or recurrent injury, and associated neck pain.
Recovery from an uncomplicated tendinosis is 6-8 weeks, and full recovery from a chronic, complicated tendinosis is 3-6 months.
Recovery from tendinitis is around 2 weeks or less.
(Williams and Kelley, 2000, Lewis, 2008, and Mitchell et al., 2005)
If conservative management fails after 3-6 months and all options have been exhausted, surgical intervention will most likely be advised. However, election and timing of surgery is made on a case by case scenario
(Rees, Maffulli and Cook, 2009)