、。
When I woke up, my body felt completely back to normal.
Literal
Eye [subject-が] wake-up-[and-see-てみる][when-と], body [topic-は] entirely energetic had-become.
元気 here doesn't mean 'cheerful' in the everyday sense but 'physically well / healthy' — the original sense of the word, 元 ('origin') + 気 ('vital energy'). 元気になる is the standard way to say 'get well / recover.' すっかり ('entirely, completely') is a common intensifying adverb built on reduplication.