> ## 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 Ball Contact

> Duration between initiation and ball contact events. This measures the total swing time from start to contact.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** seconds (s)
* **Column Name:** `time_to_ball_contact`
* **Aggregation:** mean
* **Precision:** 2
* **Calculation:** Ball contact time - Initiation time
* **Typical Range:** 0.75 – 1.02 s
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Time to ball contact measures the total duration of the swing from initiation to ball contact, providing insight into swing timing and rhythm.

## 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 | 0.57 – 0.80 s | 0.00 | 0.57 | 0.68 | 0.80 | 0.92 |
| High School | 0.57 – 0.80 s | 0.00 | 0.57 | 0.68 | 0.80 | 0.92 |
| College | 0.65 – 0.89 s | 0.58 | 0.65 | 0.79 | 0.89 | 0.96 |
| Professional | 0.65 – 0.89 s | 0.58 | 0.65 | 0.79 | 0.89 | 0.96 |
| Broad (All Levels) | 0.61 – 0.87 s | 0.45 | 0.61 | 0.74 | 0.87 | 0.95 |

## Use Cases

* Swing timing analysis
* Rhythm assessment


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