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Length Tension Relationship:
At the shortest length, the opposing actin filaments are overlapping each other and the spatial relationship between the actin and myosin is distorted. So less force can be generated. With increasing length, the actin and myosin move towards the optimal position for contraction. So force increases. The maximum force is maintained till all the myosin heads are overlapping with actin. Then the actin starts getting pulled beyond myosin heads. So some myosin becomes useless, and tension starts decreasing. Eventually, the ends of actin filaments move all they way out to the end of myosin filaments. So no actinmyosin interaction can take place, and force becomes zero. So this is a lengthtension relationship.

Chapters:
00:00 Intro
00:10 Mechanism of Muscle Contraction
00:50 Length Tension Diagram
01:15 Mechanism of Length Tension Relationship
02:54 Summary

Dr Vipul Navadiya

DISCLAIMER: This video is for education purposes only. Although every effort is made to ensure the accuracy of the material, viewers should refer to the appropriate regulatory body/authorized websites, guidelines, and other suitable sources of information as deemed relevant and applicable. In view of the possibility of human error or changes in medical science, any person or organization involved in the preparation of this work accepts no responsibility for any errors or omissions, or results obtained from the use of information in this video.