> ## 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.

# Time to Launch

> Duration between initiation and pelvis velocity initiation (launch) events. This measures the time from swing start to the beginning of power generation.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** seconds (s)
* **Column Name:** `time_to_launch`
* **Aggregation:** mean
* **Precision:** 2
* **Calculation:** Pelvis initiation time - Initiation time
* **Typical Range:** 0.16 – 0.51 s
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Time to launch measures the duration from swing initiation to the start of pelvis velocity initiation (launch event), indicating the preparation phase before power generation begins.

## Normative Ranges

Percentile distributions by competition level from the 2026 Q1 dataset; the optimal range spans the 25th–75th percentiles.

| Population         | Optimal Range (25th–75th) | 10th | 25th | 50th | 75th | 90th |
| ------------------ | ------------------------- | :--: | :--: | :--: | :--: | :--: |
| Youth              | 0.18 – 0.45 s             | 0.00 | 0.18 | 0.34 | 0.45 | 0.55 |
| High School        | 0.18 – 0.45 s             | 0.00 | 0.18 | 0.34 | 0.45 | 0.55 |
| College            | 0.33 – 0.57 s             | 0.18 | 0.33 | 0.46 | 0.57 | 0.64 |
| Professional       | 0.33 – 0.57 s             | 0.18 | 0.33 | 0.46 | 0.57 | 0.64 |
| Broad (All Levels) | 0.26 – 0.52 s             | 0.08 | 0.26 | 0.39 | 0.52 | 0.64 |

## Use Cases

* Preparation phase analysis
* Timing assessment