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Tag · 5 articles

testing protocol

Overground vs. Treadmill Running Speed: Why Your Numbers Never Quite Match
research·9 min read

Overground vs. Treadmill Running Speed: Why Your Numbers Never Quite Match

Your treadmill display and outdoor watch rarely agree, and it's rarely your fitness. See the belt-calibration math, two real studies, and how to fix the gap.

treadmill running·overground running·belt calibration
Ballistic Bench Throw Velocity Standards: What Good Actually Looks Like
research·9 min read

Ballistic Bench Throw Velocity Standards: What Good Actually Looks Like

A 0.3 m/s drop at the same load is real fatigue, not noise. See bench throw velocity benchmarks by load and level, plus how to test it without guessing.

bench throw·ballistic training·upper body power
Sprint Split Time Benchmarks: 10m and 30m Norms by Sport and Level
research·8 min read

Sprint Split Time Benchmarks: 10m and 30m Norms by Sport and Level

A 0.05s gap at 10m separates D1 corners from walk-ons. See sprint split benchmarks by sport and level, plus how to test 10m and 30m correctly.

sprint·split times·acceleration
When Your Tennis Serve Speed Gun and IMU Disagree: Ball Speed vs. Racket Speed Explained
research·8 min read

When Your Tennis Serve Speed Gun and IMU Disagree: Ball Speed vs. Racket Speed Explained

A racket IMU reading half your radar number isn't broken - it's measuring a different object. See the physics, two real studies, and how to read both.

tennis serve·IMU sensor·radar gun
Common Vertical Jump Testing Errors That Skew Your Numbers
guides·9 min read

Common Vertical Jump Testing Errors That Skew Your Numbers

Arm swing, knee flexion drift, and mid-season device switches can shift jump height by 3-5cm. Here's what the research shows and how to fix it.

vertical jump testing·test reliability·countermovement jump