the.com/workout
Paying your body in suffering today so it stops embarrassing you tomorrow.
means A bout of deliberate physical exertion done to build strength, endurance, or fitness.
from From the verb phrase to work out, meaning to solve or train thoroughly; the gym sense emerged in 1920s American boxing slang, where fighters worked the kinks out before a bout.
Muscle damageSoreness is microscopic tears, then repair, not lactic acid.
AfterburnCalories keep burning hours past the last rep.
Brain perkExercise grows the memory-running hippocampus.