American man holding a hose while it fills with water an exterior bathtub for cold plunging

american man holding hose inside exterior bathtub cold galvanized oval tub cold plunging one faceless unrecognizable hydrotherapy fresh tank outdoor water icy therapy benefits health european healthy recovery caucasian method immersion galvanized tub bath oval treatment alternative bathing lifestyle extreme preparing getting ready filling copy space flowing garden backyard still isolated metallic object