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... So in essence we are only using a portion of our muscle strength, but is the body automatically holding us back so we don't damage ourselves too badly?
In humans and cats, extra forces/torques were larger at short muscle lengths, indicating that a similar regulatory mechanism is involved
... what about those accounts where people lift 2000lb cars off family members and babies?
... a car of 1000 kg on asphalt will need a force of around 100 newtons for rolling
But does this mean that humans already use every scrap of muscle fiber in our bodies ...
... Our brain sends information to our hand saying we should stop using more strength ...
Anesthetic nerve block experiments in two human subjects also failed to abolish extra torques ... Therefore, these data indicate that extra forces/torques evoked during electrical stimulation of the muscle or nerve are muscle length-dependent and primarily mediated by an intrinsic muscle property.