Figure 1. Shoulder strength ratios by skill level (ratio + SD). Con indicates concentric; Ecc, eccentric; lr, lateral rotation; mr, medial rotation; U12, 12-years-old-and-under team; U13, 13-years-old-and-under team; U14, 14-years-old-and-under team; U15, 15-years-old-and-under team.