the.com/regimen

means A structured, repeated set of actions — diet, exercise, medication, habits — followed to reach some goal of health or order.

from From Latin regimen, 'rule, guidance, steering,' from regere, 'to keep straight, rule, direct' — the same root that gives us 'regent,' 'regulate,' and 'royal.' Latin writers used it for both the governance of a state and the care of a body: a doctor's regimen 'ruled' the patient the way a king ruled a realm. English borrowed it in the medical sense, keeping the idea that your body, too, briefly submits to a sovereign.