Due to the strength of actin-myosin bridges at different muscle lengths, tension developed by muscle during active contraction is

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The tension developed by muscle during active contraction is an inverted U-shaped function of muscle length. At short muscle lengths, the actin and myosin filaments are too close, and there is less overlap, which limits the number of cross-bridges that can form, hence decreasing the tension developed by muscle. At optimal muscle length, the actin and myosin filaments overlap optimally, allowing the formation of maximum cross-bridges between the filaments, hence leading to maximum tension developed by muscle. At long muscle lengths, the actin and myosin filaments cannot overlap efficiently, resulting in fewer cross-bridges form and decreasing the tension developed by muscle.

Due to the Strength of Actin-Myosin Bridges at Different Muscle