Stamina

Stamina is a representation of how much energy you have. Actions such as running, jumping, swimming, harvesting resources, and attacking will all drain your Stamina.  Water level drops faster when Stamina is being consumed, and so does  Food while Stamina is being regenerated. Putting a point into Stamina will increase your maximum Stamina by 10.

Increasing

Putting a point into Stamina will increase your maximum Stamina by 10. When you're out of energy you can recover it by either waiting in one spot or eating consumables like  Stimberries.

Notes

• Walking does not decrease your stamina, but will cause it to regenerate slower than if you stand still.
• If you run out of Stamina while swimming, you will move extremely slowly. When diving this could cause you to drown when trying to reach the surface.
• Stamina can be refilled faster by consuming  Stimberries,  Stimulant, or  Energy Brew. Watch for dehydration as a side-effect.
• Wild creatures and unridden tamed creatures normally don't lose stamina, i.e. they can run, swim or attack forever. There are some exceptions where they do (e.g. when trying to jump out of the water), but those are very rare.