You bring up a good point about ‘maintaining fitness’. Last winter, she broke her foot during the anchor leg of a DMR relay, in which she split 4:35 for the mile. That was after setting her 8:53 3000m PB earlier in the day. Plugging the 8:53 into Daniels’ Calculator gives an ‘equivalent’ 15:26 for the 5k, which is very close to the 15:20.1 she ran at Nationals.