Table 7. Mean values of shoulder rotation strength ratio by SST condition Tendon Condition Ratio (Ecc ER/ Con IR) Ratio (Con ER/ Con IR) Ratio (Con ER/ Ecc IR) Ratio (Ecc ER/ Ecc IR) Normal Tendon Mean 0.66 0.48 0.43 0.59 Std. Deviation 0.12 0.08 0.12 0.18 ATS Mean 0.53 0.40 0.37 0.48 Std. Deviation 0.11 0.09 0.11 0.13 Con: Concentric; Ecc: Eccentric; ER: External rotation; IR: Internal Rotation; ATS: abnormal tendon structure; std. deviation: standard deviation