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Simulated and experimental tetanic contractions. Experimental data (solid lines) consist of a single tetanic contraction of the intact medial gastrocnemius, at L0, with a 450-ms stimulation. Computational simulations (dashed lines) match experimental data reasonably well in both the young (A) and old (B) cases, with the most obvious difference being a slower rate of force decay in the modeled data. Fmax is the maximum isometric force.
