# Better Than RSI: The Simple Formula…

Page: https://stenobird.com/podcast/cheeky-mid-weeky-6384778/better-than-rsi-the-simple-formula
Text version: https://stenobird.com/podcast/cheeky-mid-weeky-6384778/better-than-rsi-the-simple-formula.md
Podcast: [Cheeky Mid Weeky](https://stenobird.com/podcast/cheeky-mid-weeky-6384778)
Published: 2026-04-01T08:29:05+00:00
Episode link: https://rss.com/podcasts/cmw/2679891
Audio file: https://content.rss.com/episodes/210220/2679891/cmw/2026_04_01_08_28_14_681736f8-bdbb-48ed-9fd5-fb4b903695c6.mp3
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JSON: https://stenobird.com/v1/public/podcasts/cheeky-mid-weeky-6384778/episodes/better-than-rsi-the-simple-formula
Duration seconds: 4743

## Resource

Dr. Lance Brooks introduces the Dynamic Rebound Index (DRI) as a superior alternative to the Reactive Strength Index (RSI) for measuring explosive power. The discussion focuses on accounting for mechanical demands and gravity when evaluating an athlete's ability to reverse velocity.

## Highlights
- Main idea: The Reactive Strength Index (RSI) fails to account for the mechanical demand of accelerating center of mass against gravity
- Practical takeaway: Use the Dynamic Rebound Index (DRI) to better quantify an athlete's ability to reverse incoming velocity into outgoing velocity
- Failure mode: Relying on high-tech data without the scientific literacy to interpret the underlying biomechanical implications
- Main idea: Effective athletic testing requires making controlled assumptions, such as standardized drop heights, to ensure measurable progress
- Practical takeaway: Focus on the athlete's ability to manage ground reaction forces relative to their center of mass rather than just raw jump height

## Topics

Biomechanics, Reactive Strength Index, Dynamic Rebound Index, Strength and Conditioning, Athletic Performance, Force Production, Velocity Based Training, Kinematics

## Chapters
- 7:00 — The Technology Gap: The danger of advanced technology access outpacing the specialized knowledge required to interpret performance data.
- 19:00 — Critiquing the RSI: An analysis of why standard RSI quantification may be misleading during high-speed ground contact.
- 25:00 — The Mechanics of Gravity: Why ignoring the acceleration of center of mass against gravity leads to inaccurate power assessments.
- 31:00 — Introducing the DRI: How the Dynamic Rebound Index uses known relationships between drop time and velocity to provide a more accurate metric.
- 43:00 — Contextualizing Metrics: Viewing new indices like DRI as specialized tools within a broader ecosystem of athletic assessment.
- 1:01:00 — Defining Reactivity: Simplifying reactivity as the ability to reverse incoming velocity into outgoing velocity.
- 1:07:00 — The Data Literacy Crisis: Why the influx of performance data is a risk to coaches lacking the training to find meaningful signals in the noise.

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## Transcript

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