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Swift Performance Blog

Sports Science.
Applied.

Research-backed insights on force-velocity profiling, sprint mechanics, the stretch-shortening cycle, and performance testing -- written by practitioners, grounded in peer-reviewed research, and built around the technology that makes accurate measurement possible.

34 articles

From Data to Decision: Turning Sprint and Jump Numbers Into Training Prescriptions
Sports Science

From Data to Decision: Turning Sprint and Jump Numbers Into Training Prescriptions

Collecting testing data is the easy part. Knowing what to do with it is harder. Here's a practical framework for moving from force-velocity profiles and jump test scores to specific training decisions.

Mark Fisher

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Force Plates Are Not Just for Labs: A Practical Guide for Coaches
Sports Science

Force Plates Are Not Just for Labs: A Practical Guide for Coaches

Force plates have moved from laboratory exclusivity to field accessibility. Here's how to use them practically—what to measure, what it means, and how to make the investment pay off.

Mark Fisher

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The Morin-Samozino Sprint Method: A Practical Field Guide
Sports Science

The Morin-Samozino Sprint Method: A Practical Field Guide

The Morin-Samozino method turned sprint force-velocity profiling into a field test. Here's a step-by-step practical guide to applying it correctly.

Mark Fisher

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RSI: The Most Underused Jump Test in Sport Science
Sports Science

RSI: The Most Underused Jump Test in Sport Science

Reactive Strength Index combines jump height and ground contact time into a single number that tells you more about athletic readiness and fast SSC function than almost any other field test. Most coaches aren't using it.

Mark Fisher

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Leg Stiffness in Sprinting: The Goldilocks Metric
Sports Science

Leg Stiffness in Sprinting: The Goldilocks Metric

Leg stiffness is one of the most important and least discussed variables in sprint performance. Too little and energy is wasted; too much and injury risk climbs. Here's what it is, how to measure it, and what to do with it.

Mark Fisher

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Fatigue and the Force-Velocity Profile: How Tiredness Changes Your Athletes
Sports Science

Fatigue and the Force-Velocity Profile: How Tiredness Changes Your Athletes

Fatigue doesn't uniformly reduce performance. It shifts the force-velocity curve in specific, predictable ways—and understanding how changes what you monitor and when you train what.

Mark Fisher

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