Sadness and regret. 1  a heavy heart idiom. 2  be/weigh on your conscience idiom. 3  bitter. bring a lump to/have a lump in your throat idiom.  broken- 1 hearted. gloom. 2  gloomy. guilt complex. 3  guilt trip. guilt- ridden. 1  guilt trip. 2  heartache. lament. 3  melancholy. mourn. rue 4  the day  idiom. 1  rueful. sackcloth.  sad. sadly.
Water walking is a form of hydroaerobics in which individuals walk through water. The low-impact exercise combines the benefits of walking with the added buoyancy of water. As water walking provides a greater level of resistance than walking on land, it works to reduce stress on the joints while strengthening and building muscle.
Water has a high surface tension. This is why some bugs like water striders (of the Gerridae family) can walk on water - because they weigh less than the surface tension of the water. Due to the shape of a water molecule, molecules stick and clump together to form this high tension (the two lighter hydrogen atoms in the image on the right could attach to the oxygen atom of another water molecule, and so forth). That's why water comes together in the form of drops - if it wasn't