Even when drawing extreme proportions, understanding real human muscle insertion points makes the transformation look convincing.

: How other characters react to the physical transformation. Examples of Similar Tropes

She removes her glasses (she doesn't need them – the strain healed her vision). She flexes her bicep, a hesitant, small motion. For the first time, she sees the faintest ghost of a line – a shadow of a deltoid.

The story typically follows a character from a slim, average, or athletic build to a highly muscular, strong physique.