themselves
Definitions
Used as the reflexive form of 'they' to indicate that the people previously mentioned are the object of their own action.
Used for emphasis when referring to the people previously mentioned.
Used to refer to the people previously mentioned in their normal or healthy state of mind.
Examples
The children amused themselves by playing hide-and-seek in the garden.
They decided to paint the living room walls themselves to save money.
The athletes pushed themselves to the limit during the final race.