Player Health Stats

In addition to the standard health bar, players in Survival 2015 are given 3 other stats. These are stamina, thirst and hunger. If any of them reaches 0, your character will die and you will lose the tools in your ROBLOX backpack/hotbar, and drop the items in your item backpack. All three stats have a maximum and starting value of 1000.

Stamina
Stamina drops or rises related to physical activity. Stamina requires the least resources, but the most time, of the three stats to regain points in. Depending on how crude your resting structure is, you might be there immobile for a while, so take care you're in a safe spot before resting.
 * Stamina decreases constantly at about 1 point every 15 seconds.
 * Jumping and climbing will decrease stamina slightly.
 * Climbing is a slightly more rigorous activity and will drop stamina by 4 points every time a player starts an ascent.
 * Swimming decreases stamina at a rate of 2 points every tenth (0.1) of a second.
 * Jumping out of water takes away 50 stamina points, a hefty penalty for going overboard or trying to go across the dangerous open waters without a boat.
 * Craft a bed or a other resting structure. Sit or lie in it and wait for your stamina to restore itself.

Thirst
As the name implies, thirst drops or rises according to how much water your character does or does not consume. To consume water simply find a water source, equip your "Eat/Drink" tool, and click on the water source. Certain tools such as the wooden bucket can be filled with water, then later equipped and drunk from. Most all water sources and water containers will show you how many portions of water they have, over the maximum portions of water they can hold.
 * A standard water portion restores 100 Thirst points
 * Thirst drops over time by 20 points every 15 seconds