sports science
Cornerback Backpedal-to-Break Test: Splitting Deceleration From Re-Acceleration Speed
The pro-agility shuttle gives cornerbacks one number. This protocol splits backpedal deceleration from re-acceleration to show where coverage breaks down.
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.
Grip Dynamometer Position Is Skewing Your Readings — Here's the Standardized Fix
Handle span and elbow angle shift grip dynamometer readings by 10-20%. A standardized setup protocol so a retest measures the hand, not the posture.
Handheld Dynamometer Hip Abduction Test Protocol: Make vs. Break Technique for Reliable Readings
Two testers, one athlete, an 18% gap. The fix: pick make or break, lock the same hip position every retest. Full HHD protocol inside.
Horizontal Force-Velocity Sprint Testing With Motorized Resistance
Two sprinters can post the same 10m time for opposite reasons. Resisted sprints split F0, V0, and power to find which one is holding yours back.
Troubleshooting Inconsistent Sprint Trial Times: A Standardization Protocol
Sprint trial inconsistency usually is not the athlete. It is the start method, lead-in distance, or rest interval shifting between reps. Here is the fix.
How Arm Swing Inflates Your Jump Test Height (And How to Fix It)
Loose arm-swing rules can shift CMJ and squat jump height by several centimeters between sessions. Fix hand position so numbers reflect leg power, not arms.
The 2k Erg Benchmark Test: A Drag Factor and Pacing Protocol for Comparable Scores
Same rower, three different 2k times, no fitness change. A protocol for locking drag factor and pacing so 2k erg scores actually compare across sessions.
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.
Rugby RHIE Test: The Tackle-Sprint-Tackle Protocol and How to Read the Decrement
A fast 20m sprint won't show tackle fatigue in the 60th minute. The tackle-sprint-tackle RHIE set, decrement formula, and position benchmarks rugby staff use.