Having thus Explain’d the Power of Motion, both on the Solids and Fluids, and having shew’d how necessary it is, that such Motion or Exercise should be continued to a Habit, that it may be render’d sufficient to procure those Ends it is directed to; I hope after these Considerations, it will appear pretty plain, that Exercise may deserve to be taken as a _common Aid_ to Physick, (to use the Term which _Asclepiades_ gave it) and ’tis under that Notion, that I propose it as so Beneficial a Medium in the Art of Curing; so that Exercise in this Sence is to Physick, as Bandage is to Surgery, an Assistance or Medium, without which, many other Administrations, tho’ ever so Noble, will not succeed. It is a kind of Reserve, but yet of that Efficacy, that the thing you most depend upon, and tho’ in it self very powerful, may yet receive its _Derniere Puissance_ from this Reserve. And to this it is that we most undoubtedly attribute the wonderful Success which the Antients had in their Curing with such indifferent Materials, as their Pharmacy afforded ’em. This will prove an Aid in a double Respect, _viz._ both of the Distemper, and of the Medicine. In Respect of the Medicine; It is to be consider’d, that some Medicines may require it, to enhance their Virtue; others to remove some Inconvenience attending their Operation, which may deter People from using ’em so liberally as they ought to do. As to the Former, the ordinary Circulation of the Blood, may not suffice to Answer the Nature of some Medicaments, and call out their utmost Efficacy; just as we see the heat of our Sun will cherish and keep alive some Exotick Plants, but yet will not suffice to bring ’em to their utmost Perfection, to flower and seed; so that Exercise in this Case, is like the just and exact Incubation to the Egg; that which Animates the Drug, and gives it a Power to produce the Effect it is directed to. A Medicine may not avail any more without Exercise, than Exercise without a Medicine, and yet when both are us’d together, there may be a Result from that Union, of the greatest Importance. Therefore, before I come to speak of the Distempers, most liable to the Power of Exercise, I shall take Notice of two or three Remedies, which seem to demand this sort of Assistance. The First, is the Decoctions of Woods; it is the general Complaint of those who take these for any Time, that they pall their Stomachs; to obviate which, if it be requisite that a Person should persist in this Course, nothing can be more proper than Riding, or some other gentle Exercise, because it will keep up the Vigour of the Spirits; and how much the Appetite depends upon that, is easie to imagine, besides that the Intention, the _Diaphoresis_, is likewise promoted thereby.