measurement artifact
Fixing Contact-Time Threshold Misdetection in Reactive Jump Tests
A force or accel threshold set too high shortens ground contact time and inflates RSI; set too low, it does the opposite. Here's how to find the right value.
Fixing 2D Perspective Error in Video Barbell Velocity Readings
Camera angle and bar depth drift can throw off video velocity readings by 5-15%. See the geometry behind the error and how to correct your camera setup.
Fixing Bar Velocity Spikes From Bouncing: How to Spot and Filter the Artifact
A single rep reads 1.4 m/s and wrecks your average. Learn why bounced reps and bar drops spike bar velocity readings, and how to filter the artifact out.
Fixing Deadlift Velocity Shifts From Grip Style: Standardizing Hook, Mixed and Strap Pulls
Switch from straps to hook grip and initial pull velocity jumps 15%? That is grip mechanics, not new strength. Here is how to standardize the reading.
Player Load Spikes as False Positives: How to Fix the Unit Shake Artifact
A loose harness can add 40+ AU to a session with zero real work behind it. Here's how to spot a Player Load false spike and stop it at the source.
RSI Inflated by Short Contact Time: How to Find and Fix the Measurement Error
A drop jump reads RSI 3.1 with a 0.09s ground contact time that felt nothing like a stiff bounce. Here's why timing-gate error inflates RSI and how to retest.
When Smith Machine Counterweights Skew Velocity Readings: How to Correct for the True Effective Load
A counterbalanced Smith machine quietly subtracts kilograms from your real load. Learn to measure the offset and stop it from wrecking your velocity zones.