Research has shown that 21% of breast cancer patient experience shoulder dysfunction (classified as ‘poor’ on the DASH outcome measure) 6 weeks after surgery, and 25.6% 6 years later (Schmitz et al, 2012). However, shoulder dysfunction drops to just 4% when early rehabilitation is implemented! (Springer et al, 2010). Serratus anterior dysfunction is just one of many reasons for shoulder dysfunction in breast cancer patients.