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. 2015 Sep 15;44:247–257. doi: 10.1007/s10439-015-1451-z

Figure 6.

Figure 6

Free-body diagram showing a highly simplified representation of the predicted ankle joint reaction force at the second peak of the GRF in gait. The Achilles force of 4.5 time body weight (4.5 BW) is computed as the force required to balance the moment produced by the ground reaction force. The values and image are taken from Patient 1 represented in OpenSim.