。
She got back to her old healthy self.
Literal
[topic-は] former-state-as-before energetic [into-に] became.
もと通り ('as it was before, just like before') is an adverb meaning the restoration of an original or prior state — もと ('origin, original') + 通り ('manner, way'). It often pairs with verbs of becoming or restoring. 元気になる ('become well/energetic') is the standard 'recover, regain health' construction. Note the contrast: もと is the noun for 'origin/former state,' while 元 also means 'origin' — they share a kanji historically (元 = もと in many contexts).