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A, example of initial measure of sagittal plane knee flexion (ϴ1) angle while the participant performs the drop vertical jump. B, example of sagittal plane knee flexion angle taken at maximum knee flexion (ϴ2) during landing. The displacement of knee flexion is found by calculating the differences in knee flexion position between positions (ϴ1 – ϴ2). Representative figure created in Poser 6.0.
