The focus on Efraimson's performance today in evaluating Cain's own performance is missing the forest for the trees.
Efraimson ran 4:07 two weeks ago. That would have won tonight's heat. She toasted herself running too many races.
Cain's own fitness is a completely separate issue. There was a close up shot of Cain after the finish where the microphone was picking up some very heavy breathing. And it seemed to be coming from Cain.
Cain fans: worry about your own while wishing the best for both. Good karma.
I agree with you partly and disagree partly. You're spot-on correct that Efraimson has been racing too much lately.
BUT, your suggestion that her 4:07 could have won tonight's heat misses completely a very important idea about middle distance racing--no two races are the same. You can't simply plug a time in from one race into another race and say, "If ...." And especially not so when the races come from different places and different times with different temperatures, different humidities, and different air pressures. In no form or fashion is it valid to suggest that if Efraimson had saved that effort for tonight she would have won the heat.
Agree about wishing best for both.