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While actin/myosin cross-bridges play a role in optimal force relationships, you also need to take into account body levers. Body levers play a much bigger role in weight lifted than actin/myosin cross-bridge length. For example, you are able to lift massive amounts of weight with your calves because of the lengths and directions of the levers. This is disregarding the fact that bouncing the weight utilizes the springiness of the achilles tendon. Also, individuals all have different body levers, which complicates things even more. People have different insertion points, etc. Also, EMG testing and basing conclusions on them can be pretty complicated. Case in point, look at this post that I got from Mel Siff: http://www.performancemenu.com/forum/showthread.php?t=4508 I think as you study physiology, biomechanics, stress adaptation, etc. you'll be amazed at how individualized everybody is. I think those who are most successful in the biological sciences realize that. Certain drugs work on some but not on others, most people's bodies can regulate cholesterol while a few can't, etc. Edit: There is some merit to what you're saying, though it's not very cut and dry. |