BACKGROUND: The Bodyblade has the potential of enhancing conservative management of Traumatic Anterior Shoulder Instability (TASI). PURPOSE: The purpose of this study was to compare three different protocols: Traditional, Bodyblade, and Mixed (Traditional and Bodyblade) for shoulder rehabilitation on athletes with TASI. STUDY DESIGN: Randomized-controlled longitudinal training study. METHODS: Thirty-seven athletes (age 19.9 +/- 2.0 years) were allocated into Traditional, Bodyblade, and Mixed (Traditional/Bodyblade) training groups (3x week for 8-weeks). The traditional group used resistance bands (10 to 15 repetitions). The Bodyblade group transitioned from classic to the pro model (30 to 60-s repetitions). The mixed group converted from the traditional (weeks 1 to 4) to the Bodyblade (weeks 5 to 8) protocol. Western Ontario Shoulder Index (WOSI) and the UQYBT were evaluated at baseline, mid-test, post-test, and at a three-month follow-up. A repeated-measures ANOVA design evaluated within and between-group differences. RESULTS: All three groups significantly (p = 0.001, eta2: 0.496) exceeded WOSI baseline scores (at all timepoints) with training (Traditional: 45.6%, 59.4%, and 59.7%, Bodyblade: 26.6%, 56.5%, and 58.4%, Mixed: 35.9%, 43.3% and 50.4% respectively). Additionally, there was a significant (p = 0.001, eta2: 0.607) effect for time with mid-test, post-test and follow-up exceeding baseline scores by 35.2%, 53.2% and 43.7%, respectively. The Traditional and Bodyblade groups (p = 0.049, eta2: 0.130) exceeded the Mixed group UQYBT at post-test (8.4%) and at three-month follow-up (19.6%). A main effect (p = 0.03, eta2: 0.241) for time indicated that WOSI mid-test, post-test and follow-up exceeded the baseline scores by 4.3%, 6.3% and 5.3%. CONCLUSIONS: All three training groups improved their scores on the WOSI. The Traditional and Bodyblade groups demonstrated significant improvements in UQYBT inferolateral reach scores at post-test and three-month follow-up compared to the Mixed group. These findings could lend further credibility to the role of the Bodyblade as an early to intermediate rehabilitation tool. LEVEL OF EVIDENCE: 3.

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