After either workout method, your muscles stay swollen for three full days — meaning your body is still responding to the stress long after the workout ends.

Acute muscle swelling responses following a single resistance training session are not representative of swelling responses observed after prolonged, repeated training programs.

Muscle swelling following resistance training returns to baseline within 24 hours, regardless of training volume (7–21 sets per session).

When trained men do strength exercises, their muscles get about 13.5% bigger right after because they fill with fluid. Certain workout styles make this happen more than others.

Checking your muscle size right after a workout won’t tell you how good your workout was — it’ll look normal by the next day no matter how hard you went.

Muscle swelling induced by resistance training may persist for up to 72 hours post-exercise, potentially confounding hypertrophy measurements if assessed within this window.