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. 2021 Jan 17;121(4):1099–1110. doi: 10.1007/s00421-020-04585-1

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© The Author(s) 2021

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Fig. 2 — Representative a Axial MR image of the thigh and b Sagittal MR image of the knee joint. Patellar tendon moment arm was defined as the perpendicular distance between the tendon line of action and the tibio-femoral contact point (TFCP)