---
title: index
framework: healthkit
role: symbol
role_heading: Instance Property
path: healthkit/hkworkoutzone/index
---

# index

The zero-based index of the zone within the containing zone configuration, ordered from lowest to highest threshold.

## Declaration

```swift
let index: Int
```

## See Also

### Accessing zone properties

- [minimum](healthkit/hkworkoutzone/minimum.md)
- [maximum](healthkit/hkworkoutzone/maximum.md)