> ## 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              | 0.14 – 0.41 s             | 0.00 | 0.14 | 0.23 | 0.41 | 0.57 |
| High School        | 0.17 – 0.48 s             | 0.00 | 0.17 | 0.29 | 0.48 | 0.65 |
| College            | 0.18 – 0.58 s             | 0.00 | 0.18 | 0.35 | 0.58 | 0.77 |
| Professional       | 0.18 – 0.67 s             | 0.10 | 0.18 | 0.45 | 0.67 | 0.79 |
| Broad (All Levels) | 0.16 – 0.51 s             | 0.00 | 0.16 | 0.29 | 0.51 | 0.72 |

## Use Cases

* Preparation phase analysis
* Timing assessment