Unstretch'd; as for Example, when Mankind Stands, their Legs, Thighs, Hams, and Back, are Straight, as one Straight Line, but when they Go, their Legs Tuck up, as first one Leg, then th' other, which Pulling, or Tucking up, Slack∣ens all the Nerves and Sinews, from the Back Downwards, and that gives Ease; for 'tis not only Change that gives Ease, but the Slacking of the Nerves and Sinews, which are as if they were Stretch'd upon a Rack, when they are Drawn Straight out at Length by Standing, but it shews, your Sinews and Nerves are not very Tough and Strong, but rather Tender and VVeak, being soon VVeary in Standing Still, for the Nerves and Sinews are as Strings, or Cords, which Tie, or Knit the several Parts of the Body together, where some are Stronger, and Tougher, as not easily Stretch'd; like as VVyer, or Lute-strings, or Bow-strings, some are so Hard, as they will sooner Break than Stretch, others so Limber, as to Stretch into a Hairs Smallness, which makes them not so Firm nor Steady, but apt to Tremble and Shake, at the least Touch, or Motion of the Air, whenas those that are Hard and Tough, require some Strength to Stir them. The like is with the Nerves and Sinews, those that are Weak and Tender, when Stretch'd, are apt to Move, which is the reason that many with Standing Long, will so Tremble and Shake, as to be ready to fall to the Ground, the Lower Parts of their Body being not able to bear them