But now what place hath exercise here? to helpe nature by motion in all these her workinges, and wayes for health: to encrease and encourage the naturall heat, that it maye digest quickly and expell strongly: to fashion and frame all the partes of the bodie to their naturall and best hauiour: to helpe to rid needelesse, and superfluous humours: reffuse and reiected excrementes, which nature leaues for naught, when she hath sufficiently fed, and wisheth rather they were seene abrode, then felt within. And be not these great benefites? to defend the body by defeating diseases? to stay the minde, by strengthening of her meane? to assist nature being both daily, and daungerously, assailed both within and without? to helpe life to continue long? to force death, to kepe farre a loufe?
Now as all constitutions be not of one and the same mould, and as all partes be not moued alike, with any one thing: so the exercises must alter, and be appropriate to each: that both the constitution may be continued in her best kinde, and all the partes preserued to their best vse, which exercises being compared among themselues one to an other, be more or lesse, but being applyed to the partie kepe alwayes in a meane, when they meane to do good. Concerning students, for whose health my care is greatest, the lesse they eate, the lesse they neede to voide: and therfore small diet in them, best preuenteth all superfluities, which they cannot auoide, if their diet be great and their exercise small. Their exercise must also be very moderate, and not alter to much, for feare of to great distemperature in that, which must continue moderate: and with all it should be ordinarie, that the habit may be holesome, and sudden chaunge giue no cause of greater inconuenience. Wherfore to auoide distemperature the enemie to health, and so consequently to life, and to maintaine the naturall constitution so, as it may serue to the best, wherin her duetie lyeth, and liue to the longest, that in nature it can, besides the diet, which must be small, as nature is a pickler, and requires but small pittaunce: besides clothing which should be thin euen from the first swadling to harden, and thick the flesh: I do take this traine by exercise, which I wishe to be ioyned with learning, to be a marueilous furtherer.