field testing
Force Plate Baseline Drift: Zeroing and Tare Fixes for Clean Session Data
Body weight creeping mid-session? Temperature and residual load quietly shift a plate's zero. A field checklist for re-zeroing before it wrecks your data.
Golf Clubhead Speed Launch-Monitor Testing: Fixing Placement and Marking Errors for Reliable Data
Clubhead speed swings 4-5 mph between sessions and it's rarely the swing. A launch-monitor placement and club-marking protocol that keeps the number honest.
Why GPS Underreports Sprint Max Speed and How to Fix It
GPS max speed reads low for a reason: sampling rate, smoothing filters, and satellite lock. A control protocol to isolate which one is costing you km/h.
Hop Test Battery for ACL Return-to-Sport: Protocol, Scoring, and Cutoffs
One hop test rarely tells the whole story. Run all four - single, triple, crossover, timed hop - with real LSI cutoffs and where the research draws the line.
The Motocross Arm-Pump Grip Test: Measuring How Fast Grip Force Decays Under Repeated Squeezes
Grip doesn't fail all at once on a moto, it decays rep by rep. This 15-squeeze protocol clocks exactly how fast, before arm pump costs a lap.
Mountain Bike Repeated Climb Power Test: Scoring XCO Fatigue Resistance
One clean climb time won't predict lap five. A repeated-climb protocol that scores power maintenance across 5 reps, built for XCO race demands.
Neck Isometric Strength Dynamometer Protocol: 4-Direction Setup and Concussion-Risk Interpretation
Neck strength dynamometer testing done sloppily wastes a preseason baseline. A 4-direction setup, scoring math, and normative bands for contact-sport screening.
Prone Hamstring Isometric Dynamometer Test: A Reproducible 15-Degree/90-Degree Knee-Angle Protocol
Handheld dynamometer hamstring numbers swing between testers because the device is hand-resisted. A strap-anchored 15-degree/90-degree protocol that holds up.
Repeated Jump Anaerobic Endurance Test: Protocol, Fatigue-Slope Scoring, and Norms
A single jump height tells you nothing about round 15. A 20-jump field protocol that fits a fatigue slope to the decline and scores real anaerobic endurance.
The 30-Minute Rowing Critical Power Test: How to Measure CP and W' on the Erg
Most rowers guess threshold from a discounted 2k split. A 30-minute erg test pulls out real critical power and W' with the math, cutoffs, and zones.
Rowing Erg Drag Factor: Why It Silently Breaks Your Watt and 2K Comparisons
Locking the damper lever isn't locking resistance. Drag factor drift quietly wrecks watt and 2K comparisons across sessions, and here's the fix for it.
The Sailing Hiking Endurance Test: Standardizing an Isometric Hold to Track Hiking Conditioning
Hiking harder every week doesn't mean conditioning improved. This isometric hold test fixes knee and trunk angle so the trend line actually means something.