noun
second wind
Borrowed from English; used in sports, exercise, or metaphorically for a renewed burst of energy after fatigue.
マラソンで30キロを過ぎたあたりでセカンドウインドが来た。
I got my second wind around the 30-kilometer mark in the marathon.
徹夜で疲れていたが、朝方にセカンドウインドを感じて仕事を終わらせた。
I was exhausted from staying up all night, but I felt a second wind in the early morning and finished my work.