the.com/hypertrophy
Cells getting swole because you asked them to, repeatedly, with weights.
means The enlargement of an organ or tissue from its existing cells growing bigger, not multiplying.
from Greek hyper (over) plus trophe (nourishment) — literally over-feeding, coined by 19th-century pathologists watching tissues bulk up.
Not new cellsExisting cells swell; that is hyperplasia's job.
Heart tooHearts hypertrophy from high blood pressure, often dangerously.
Muscle pumpFibers thicken via more contractile proteins, not more fibers.