Stretching

Definition and stakes

Henry Baker and James Mounsey,  Philosophical Transactions of the Royal Society (1765)

“ By the word stretchings I mean the stretching of his body and limbs by a slow and gentle convulsion of the extensor muscles; for in all the attacks I never observed the flexores any way affected. — His feelings were frequently so odd that, he said, he could not describe them. He often felt as if his left side, from his head to his waste was empty, and that millions of small bodies were drove up and down with great velocity: which he likened to the shaking of peas in a bladder. ”
Source: Wikisource

Portrait of John Gray McKendrick John Gray McKendrick,  Life in Motion (1892)

“ Compare this with the muscle. You observe the first weight stretches it so much; if the weight is now doubled we do not get twice the amount of extension, but less than half; if the weight is again increased by one third, we get only a little more stretching; and so on, each increase on stretching becoming less and less. Thus, with the india-rubber, if we note the amount of stretching on the board by a number of vertical lines, each line representing a uniform increase in the weight, and if we join the end of these lines we get a straight line. ”
Source: Wikisource

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