# Tool.setMovementSlowDown

Sets whether the player is slowed down. This is similar to crouching and normally occurs when the player is aiming.

**Kind:** Function

**Environments:** Game

## Game

``` { .lua .api-signature }
tool:setMovementSlowDown( slowDown )
```

[Open the full Game reference](../Game-Script-Environment/Userdata/Tool.md#setmovementslowdown)

**Availability:** Client only

**Parameters:**

| Name | Type | Description |
| --- | --- | --- |
| `tool` | [Tool](../Game-Script-Environment/Userdata/Tool.md) | The tool. |
| `slowDown` | boolean | Whether the player movement is slowed down. |