Tibiofemoral rotation in landing: The influence of medially and laterally posted orthotics
Objective. To assess the relationship between foot alignment and transverse plane knee motion during a single leg-landing task. Design. Clinical trial. Setting. Hospital biomechanics laboratory. Participants. Seven healthy young women without excessive forefoot, arch, or rear-foot malalignments. Methods and measures. Varus and valgus foot malalignments were mimicked by placing 8° medial and lateral posted orthotics into the shoes before participants performed three landings from a drop jump off a 43 cm high platform. The change in tibiofemoral rotation relative to the no orthotic condition was measured. Results. The medial posted orthotic resulted in 3.1 ± 5.5° less internal tibiofemoral rotation as compared to the nonorthotic condition, while the lateral posting produced 2.6 ± 2.2° more internal tibiofemoral rotation (t = -2.51, p ≤ 0.03). Conclusions. Orthotic induced malalignments altered the magnitude of tibiofemoral rotation during a closed kinematic chain activity. Orthotic posting may be used to reduce the rotary stress on the knee during landing activities.
Public Health and Sports Medicine
Closed-chain STJ pronation, Orthotics, Subtalar joint, Tibiofemoral
Tillman, Mark D., Andrea B. Chiumento, Mark H. Trimble, Jeffrey A. Bauer, James H. Cauraugh, Thomas W. Kaminski, and Chris J. Hass. "Tibiofemoral rotation in landing: the influence of medially and laterally posted orthotics." Physical therapy in sport 4, no. 1 (2003): 34-39.
Physical Therapy in Sport