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. Author manuscript; available in PMC: 2021 Apr 15.
Published in final edited form as: J Neurol Phys Ther. 2020 Jan;44(1):42–48. doi: 10.1097/NPT.0000000000000299

Fig. 1.

Fig. 1.

(A) Propulsion is produced when an ankle plantarflexion moment (MPF) is generated when the limb is oriented behind the body (ϴ). (B) Combining isometric strength testing with muscle electrostimulation allows assessment of both a muscle’s maximum voluntary strength and strength capacity. The ratio of these force measurements is used to compute Central Drive.