Reletter
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Performance Science

Yassir Kahook

My personal newsletter where I will be sharing some thoughts and ideas on sports performance and sports science.

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Substack
PricingOnly free issuesPublishesWeekly
Issues21Founded3 years agoLast Issue5 months ago
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Latest Issues

Using Body Weight, Jump Momentum, and Peak Velocity to Monitor Weight Gain

Gaining body weight is often a goal for developing baseball players—but not all weight gain is created equal. The number on the scale alone doesn’t tell us whether added mass is helping performance, hurting movement quality, or simply addin...

5 months ago
2

The Missing Link Between the Weight Room and the Field

Baseball performance is easy to measure. Pitch velocity and exit velocity are two of the most visible—and easiest—metrics to look at. They’re not the only indicators of performance, but they often serve as the first signal that something is...

5 months ago
4

What Force Plates Actually Measure (And What They Don’t)

Force plates don’t measure performance.

They measure interaction with the ground.

Thanks for reading Performance Science! Subscribe for free to receive new posts and support my work.

That distinction matters.

Force Is a Behavior

Every...

5 months ago
1

Force Plates Don’t Build Athletes—Interpretation Does

Force plates give us jump height, braking and propulsive impulse, phase durations, RSI-mod, and phase-specific asymmetry—quickly and consistently.

But data alone doesn’t improve performance. Understanding why an athlete produces a given fo...

5 months ago
1

Building a better Force Plate Dashboard

Setp 1: Defining What You Actually Need

Force plates give you great data — but without structure, it’s noise.

Start by asking:

• What do I want to know from this data?

• What decisions should it influence?

Keep it simple. Most coaching...

7 months ago

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  • Yassir Kahook

    Sports Science Coordinator, Strength and Conditioning Coach at Cressey Sports Performance - Florida; University of Akron Alum

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