We present a simple two-dimensional analytical model that estimates the knee joint loading during vertical ladder climbing. By developing a model with simplification assumptions, such as vertical ascent with no whole-body angular acceleration, we can grossly estimate knee loads under dynamic conditions using posture and whole-body acceleration. The model presented demonstrates that upward whole-body acceleration influences the knee load on the leading leg of the climber during ladder mounting and climbing.

In an effort to define the preferential departure acceleration during ladder ascent for use with the model presented, we also present preliminary data of the initial step onto a fixed ladder. These data are combined with the model at the moment of initial stance foot departure to generate preliminary knee loading estimates. Where appropriate and possible, the authors have attempted to compare and validate the analytical model with published knee loading.

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