She was fighting fit after 10 weeks of intense physical training.
idiombe fighting fit BrEBrEused in order to say that someone is very healthy, especially after being ill or in spite of being old:Your grandmother is responding well to treatment and seems to be fighting fit.Bruce is fighting fit and will be ready to play again next season.
be fighting fit
To be in very good health. Primarily heard in Australia. My father has never been sick a day in his life—he's truly fighting fit.Now that I'm going to the gym regularly, I hope to be fighting fit soon.