THE EVOLUTION OF FITNESS TESTING: THE HISTORY AND SCIENCE OF THE 30-15IFT [Part 1]
Traditional continuous fitness tests fail to capture the chaotic, stop-and-go nature of team sports . The 30-15 Intermittent Fitness Test (30-15IFT) solves this by alternating 30-second shuttle runs with 15-second rest periods . This produces a unique final speed score (V IFT ​ ) that combines an athlete's aerobic power, anaerobic capacity, recovery speed, and change-of-direction efficiency . Ultimately, this provides coaches with a highly accurate metric to individualize and optimize high-intensity interval training (HIIT) for their players
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THE LOCOMOTOR PROFILE MASTERCLASS: SYNERGIZING SPEED, MASS, AND GAME DAY DOMINACE
The Locomotor Profile Masterclass deconstructs how elite sports science evaluates on-field performance by looking past the "stopwatch illusion" and traditional weight room silos. True game-day dominance requires a perfect synergy between an athlete's Engine Dynamics (energy production and raw speed) and Handling Dynamics (force multiplication and maneuverability)
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THE AGILITY TAX - MANAGING THE CHAGE OF DIRECTION (COD) DEFICIT
the Change of Direction (COD) Deficit, a critical metric used to distinguish an athlete's linear sprinting speed from their mechanical handling efficiency. While traditional agility tests often reward raw velocity, the COD Deficit isolates the specific time lost during a turn to reveal how effectively a player can decelerate and re-accelerate.
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FROM ONE TEAM TO MANY: HOW WHISTLE PERFORMANCE PARTNERED WITH ARIZONA ATHLETICS TO REDEFINE PERFORMANCE SCIENCE IN REAL TIME
It all started with a pesky data problem and one college soccer team willing to reimagine the way performance science had always been done. The women’s soccer program at the University of Arizona was already deeply data-driven; it collected GPS metrics and was resolute in the notion that performance science should be embedded in training decisions.
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SCALING THE CHASSIS: ENGINEERING CAREER LONG SPRINT MOMENTUM
The Speed Ceiling: Raw speed naturally peaks early due to unyielding genetic factors like muscle fiber distribution and CNS signaling...
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THE BULK TRAP: WHY GETTING BIGGER MIGHT BE RUINING YOUR ATHLETES
Excessive weight gain in athletes often creates a "slow ceiling" by sacrificing speed for sheer size. It highlights the Anaerobic Speed Reserve (ASR) as a vital performance metric, representing the gap between an athlete's aerobic base and their maximum sprinting velocity.
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SPRINT MOMENTUM: THE PHYSICS OF COLLISION DOMINANCE
In collision sports, raw speed on a stopwatch is an illusion because it ignores an athlete's physical mass . True on-field dominance is instead measured by Sprint Momentum—an athlete's body mass multiplied by their maximal sprint speed—which calculates the actual kinetic energy they bring into a tackle .
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THE ULTIMATE PLAYBOOK FOR JUMP DIAGNOSTICS: MERGING DEPTH, STIFFNESS, AND WAVEFORM ANALYSIS
A data-driven framework for assessing athletic performance by analyzing how athletes move—not just jump height. Using metrics like RSI-Mod, active stiffness, and eccentric velocity, it helps coaches identify fatigue, improve explosive efficiency, and detect injury risk in real time.
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ECCENTRIC UTILIZATION RATIO AND RATE OF FORCE DEVELOPMENT RELATIONSHIPS [ARTICLE REVIEW]
This exploratory study investigates whether the eccentric utilization ratio (EUR), a common metric comparing countermovement jumps to squat jumps, is actually a reliable indicator of superior athletic ability.
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THE EFFECT OF ACUTE FATIGUE ON COUNTERMOVEMENT JUMP PERFORMANCE IN RUGBY UNION PLAYERS
Introduction: Why This Research Matters In the high-stakes world of professional sports, specifically Rugby Union, managing the delicate balance between training load and...
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FATIGUE OR STRATEGY? USING RSI-MOD TO PINPOINT PERFORMANCE DECREMENTS
In high-performance environments, Jump Height has historically been the "king" metric. However, Jump Height is an outcome measure, it tells you what happened, but not how it happened...
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HOW LETOURNEAU’S S&C DIRECTOR BUILT A PERFORMANCE PROGRAM WITHOUT BURNING OUT
Lucas Mason oversees strength and conditioning for 15 sports at LeTourneau University. He's the only full-time S&C coach. Here's how he makes the impossible math work...
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