Bags go missing from time to time, and it seems there is nothing that can be done to stop that. Another issue for airlines is fitting all of the bags on their planes. Due to changes in weather and flight distance, fuel can be prioritized over luggage.
That means that the passengers will still fly, but there is no guarantee that all of the bags they checked beforehand will be coming with them as well. Instead, the luggage will have to be flown in on another flight at another time.
Staying fit is certainly a commitment. Besides doing the physical training, there are some other factors to consider, like nutrition