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# HKMetadataKeySwimmingStrokeStyle

A key that indicates the predominant stroke style for a lap of swimming.

```
let HKMetadataKeySwimmingStrokeStyle: String
```

## Discussion

Set this key on workout lap events. Set its value to an <doc://com.apple.documentation/documentation/Foundation/NSNumber> object that contains a valid value from the  [`HKSwimmingStrokeStyle`](/documentation/HealthKit/HKSwimmingStrokeStyle) enumeration.

## Topics

### Valid Stroke Styles

[`HKSwimmingStrokeStyle`](/documentation/HealthKit/HKSwimmingStrokeStyle)

The style of stroke while swimming.


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