Comparison of the Cybex II® Standard Shin Adapter Versus the Johnson Anti-Shear Device in Torque Generation

Marcia Epler, Deborah A. Nawoczenski, Terry Englehardt

The purpose of this study was to determine if differences exist in peak torque and total work performed when the Johnson Anti-Shear Device was utilized as compared to the standard shin adapter during knee extension. The Cybex II, in conjunction with the HUMAC computer system was used in this study. Twenty-seven healthy subjects, with no history of knee pathology, were tested on successive days at speeds of 60°/sec and 180°/sec. Results demonstrated a significant decrease (p < 0.05) in peak torque at low speeds as well as total work performed at high speeds when using the anti-shear device. The findings indicate that the clinician/researcher must be consistent with the choice of shin pad in order to ensure valid, reliable data.

J Orthop Sports Phys Ther 1988;9(8):284-286.

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