The phrase "health gauge" refers to a measurement or indicator of a person's physical condition. It helps determine how healthy or fit someone is. Full definition
If your online presence becomes a financial health gauge, there are legal protections to know about. (npr.org)
As an added bonus, additional content in the form of Taiko No Tatsujin, the theme items ranging from outfits to health gauge skins bring up some zaniness to the battlefield we are all used to. (coin-drop.com)
The brigades are necessary to defeating the monsters as they have extremely high health gauges but the brigades are too weak for a sustained attack and quickly have to be issued retreat orders in order to allow them to recover for an additional attack. (thatvideogameblog.com)