> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spikeapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Statistic Types and Methods

> This document provides a comprehensive overview of all statistics, detailing their methods, metrics, units, precision, and descriptions. The table below summarizes the key features supported by each statistic.

## Statistics

The following table lists all the statistics available, along with their descriptions, applicable methods, associated metrics, units of measurement, and number of decimals for output precision.

| **Label**                           | **Description**                                                    | **Methods**             | **Metrics**                                                                                                                                                                                                                       | **Unit** | **Precision** |
| :---------------------------------- | :----------------------------------------------------------------- | :---------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------- | :------------ |
| calories\_burned\_active            | Calories burned during active periods                              | intersect\_sum          | `calories_burned_active`                                                                                                                                                                                                          | kcal     | 4             |
| calories\_burned\_basal             | Calories burned at rest (basal metabolic rate)                     | intersect\_sum          | `calories_burned_basal`                                                                                                                                                                                                           | kcal     | 4             |
| calories\_burned\_total             | Total calories burned including basal and active periods           | intersect\_union\_sum   | `calories_burned` `calories_burned_basal` `calories_burned_active`                                                                                                                                                                | kcal     | 4             |
| distance\_cycling                   | Total distance covered while cycling                               | intersect\_sum          | `distance_cycling`                                                                                                                                                                                                                | meters   | 4             |
| distance\_running                   | Total distance covered while running                               | intersect\_sum          | `distance_running`                                                                                                                                                                                                                | meters   | 4             |
| distance\_total                     | Total distance covered across all activities                       | intersect\_union\_sum   | `distance` `distance_walking` `distance_cycling` `distance_running`                                                                                                                                                               | meters   | 4             |
| distance\_walking                   | Total distance covered while walking                               | intersect\_sum          | `distance_walking`                                                                                                                                                                                                                | meters   | 4             |
| duration\_high\_intensity           | Duration of high level intensity                                   | intersect\_sum          | `duration_high_intensity`                                                                                                                                                                                                         | ms       | 0             |
| duration\_low\_intensity            | Duration of low level intensity                                    | intersect\_sum          | `duration_low_intensity`                                                                                                                                                                                                          | ms       | 0             |
| duration\_moderate\_intensity       | Duration of medium level intensity                                 | intersect\_sum          | `duration_moderate_intensity`                                                                                                                                                                                                     | ms       | 0             |
| heartrate                           | Average heart rate over a period                                   | duration\_weighted\_avg | `heartrate`                                                                                                                                                                                                                       | bpm      | 0             |
| heartrate\_max                      | Maximum recorded heart rate, providing insights into peak values   | max                     | `heartrate`                                                                                                                                                                                                                       | bpm      | 0             |
| heartrate\_min                      | Minimum recorded heart rate, providing insights into lowest values | min                     | `heartrate`                                                                                                                                                                                                                       | bpm      | 0             |
| heartrate\_resting                  | Average resting heart rate                                         | duration\_weighted\_avg | `heartrate_resting`                                                                                                                                                                                                               | bpm      | 0             |
| hrv\_rmssd                          | Heart rate variability measured by RMSSD                           | duration\_weighted\_avg | `hrv_rmssd`                                                                                                                                                                                                                       | ms       | 0             |
| hrv\_sdnn                           | Heart rate variability measured by SDNN                            | duration\_weighted\_avg | `hrv_sdnn`                                                                                                                                                                                                                        | ms       | 0             |
| sleep\_duration\_total              | Total sleep duration across all sleep stages                       | intersect\_union\_sum   | `sleep_duration_deep` `sleep_duration_light` `sleep_duration_rem` `sleep_duration_awake`                                                                                                                                          | ms       | 0             |
| sleep\_score                        | Overall sleep score based on various sleep metrics                 | sleep\_score            | `bedtime_duration` `sleep_duration` `sleep_duration_nap` `sleep_duration_light` `sleep_duration_deep` `sleep_duration_rem` `sleep_duration_awake` `sleep_interruptions` `sleep_efficiency` `sleep_latency` `sleep_breathing_rate` | count    | 0             |
| sleep\_skin\_temperature\_deviation | Sleep skin temperature deviation from the baseline                 | intersect\_sum          | `sleep_skin_temperature_deviation`                                                                                                                                                                                                | celsius  | 2             |
| steps                               | Total number of steps taken                                        | intersect\_sum          | `steps`                                                                                                                                                                                                                           | count    | 0             |

## Methods

The table below provides details on the various methods used in the statistics, including a brief description of each.

| **Label**               | **Description**                                                                                                                  |
| :---------------------- | :------------------------------------------------------------------------------------------------------------------------------- |
| duration\_weighted\_avg | Average of values weighted by their duration, ensuring longer durations have a greater impact on the average.                    |
| intersect\_sum          | Sum of intersecting values of specified metrics, aggregating overlapping data points to provide a total count or sum.            |
| intersect\_union\_sum   | Sum of the union of intersecting values, merging several metrics to provide a comprehensive aggregation across multiple metrics. |
| max                     | Maximum value of the specified metrics, providing insights into the peak values recorded.                                        |
| min                     | Minimum value of the specified metrics, providing insights into the lowest values recorded.                                      |
| sleep\_score            | A score representing the quality of sleep, calculated using intersecting values.                                                 |