bulk up
Pack on muscle
To bulk up is to gain size and mass, especially muscle through weight training and increased eating: He's been bulking up for football season.
The phrase can apply to things as well as bodies—adding volume, padding, or substance: They bulked up the report with appendices.
The opposite process is cutting or leaning out.
protein
Folded amino chain
- liftingRaising something heavy
- bodybuildingMuscle enlargement for appearance
- gymExercise facility
dumbbells · barbell · reps · sets · workout · strength · hypertrophy · squat · deadlift · bench
expand
Increase in size
inflate · amplify · augment · boost · extend · increase · pad · fill out · thicken · add
body mass change
bulk upslim down
Reduce body size
lose weight · trim down · waste away · shrink · whittle down
up, bulk, bulky, bulge, bulging, bulks, bulkiness, bulkier, bulkiest