Which technology keeps track of heart rate during a workout?

Ineed to know what to put in the blanks.

David, an aspiring baseball player, was struck on the left side of his face with a fastball pitch. he was not wearing a safety helmet. his zygomatic arch was crushed, as well as parts of the temporal bone. following the accident and reconstructive surgery, he noted that his left lower eyelid was still drooping and the corner of his mouth sagged. what nerve damage did he sustain?

If hot water is not available in the ware washing sink, food establishments can still serve food using