Freezing Cold Water in a Tub, for Relieving Aches
Puzzle 14 of Running a Marathon Pack
Question is: Freezing Cold Water in a Tub, for Relieving Aches
and the answer is: ICEBATH
Word Meaning:
ICE BATH — A receptacle containing ice and water (and sometimes salt) that is used to lower something's temperature, or to keep it cold.
Definitions from Wiktionary.