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An illustration of the coupling-angle–variability (CAV) calculation for the hip-flexion/knee-flexion joint coupling for a representative participant. The top left shows hip and knee flexion across 3 drop–vertical-jump (DVJ) trials; the bottom left shows the coupling angle (γ) for the DVJ trials and the mean angle; the top right shows the mean horizontal (x̄) and vertical (x̄) components of the mean coupling angle; the bottom right shows the CAV.
