Problemata (Problems)

...reclining original: "κατάκλισις" (kataklisis) is easier. And just as with parts of the body that are under pressure, any exercise original: "γύµνασιν" (gymnasin) becomes intense; but one must choose the opposite [position] to that in which the reclining occurs. It is as if a certain suspension original: "κρεµασµὸς" (kremasmos) takes place. In a state of suspension, there is a sharp tension of the parts being stretched. Indeed, it becomes even more pronounced. —

Because, since the origin of movement original: "κινήσεως" (kinēseōs) occurs toward the point where the materials hylai: the bodily fluids or humors that were thought to be the "matter" of physiological processes converge. Since the origin of movement is in the inner depths—at the center—it is natural that the materials from every part of the body are drawn away and converge upon this central part. Consequently, the extremities are stripped of the material contained within them, which is then carried toward the center. Having been thus deprived, and in the process involving the movement of that material, the extremities undergo a chilling original: "περίψυξιν" (peripsyxin).

Pleasure original: "ἡδονὴ" (hēdonē), on the other hand, is like a diffusion and relaxation original: "ἄνεσις" (anesis) of the body; in a certain way, sensation original: "αἴσθησις" (aisthēsis) itself signals this. It is clear, then, that pleasure also arises from this part.