片足立 ---> I wonder if this is the standing straight with one foot and see how long you can stand...
anyway looks like Rika is getting a bit weak even though the average ranking is the same. Having a low breathing capacity is not a good thing, especially she need to sing/dance/play futsal, if too much exercises are involved at the same time/long time, she may feel faint due to lack of oxygen...

Maybe Rika will need some hell-training from Kitazawa (Gatas trainer) to get her physicals back!