She likes to exercise using 'free weights'. [=weights (such as dumbbells and barbells) that are not attached to a piece of equipment]
('disapproving') The new manager immediately started 'throwing her weight around', making changes to staff and policy.
The doctor says you shouldn't put any 'weight' on that foot for a week. [=you shouldn't stand on that foot for a week]
(..) I'm so much older than she is, and.... Well, now I haven't a cent to my name. Who has nowadays? Miss Scarlett, if true love carries any weight with you... ...you can be sure your sister will be rich in that. I'll go out somewhere and get myself a little business if we're engaged. (..)1939 Gone with the Wind