Heart Rate Strap Soak Tub in Nanjing Recovery Lounge

North window light slices across a white plastic soak tub filled with water, illuminating dust motes that hang suspended in the air shafts. The tub sits on a polished concrete floor, positioned beside a row of black foam rollers arranged with geometric precision. Reflections in the still water create a mirrored composition, doubling the image of the submerged heart-rate straps floating near the surface. A small metal drain plug glints under the cool midday illumination. The surrounding space remains empty of people, marking the brief pause between training waves. The water ripples slightly where a strap rests, distorting the reflection of the nearby equipment maintenance cart. One shadow falls across the rim of the tub, defining the edge where the liquid meets the plastic.