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

# Bottom Time

> Time spent at the bottom position of the squat.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** seconds (s)
* **Column Name:** `time_while_at_bottom`
* **Aggregation:** mean
* **Precision:** 2
* **Optimal Direction:** Middle — moderate values are optimal
* **Measurement:** Duration spent at or near [Bottom](/biomechanics/activities/squat/events/bottom) (between bottom1 and ascent start)

## Description

Bottom time is the duration the athlete holds the bottom position of the squat. It is used in bodyweight, overhead, and single-leg squats. Together with the [Continuous](/biomechanics/activities/squat/metrics/continuous) metric, it helps distinguish paused vs. continuous squats.

## Use Cases

* Paused vs. continuous squat classification
* Tempo and control assessment
* Protocol compliance (e.g., required pause duration)