Step-by-step, no fluff.
Practical guides for improving athletic performance and training smarter with measurable data.
Manual Stopwatch Sprint Timing Bias Correction: Aligning Hand-Timed Splits With Gate Data
Hand-timed sprints read about 0.2s fast. A field protocol for measuring your own timer's bias and correcting it to match gate-verified sprint times.
Markerless Motion Capture: Fixing Occlusion Dropouts in Fast Rotational Movements
Fast rotational sports movements make markerless motion capture hallucinate or drop joints. Here's how to spot occlusion dropout and fix your camera rig.
How to Run a Maximal Aerobic Speed (MAS) Test: A Field Protocol for Setting Real Interval Speeds
That VO2max number came from a formula, not a real run. Field-test true Maximal Aerobic Speed on a track and set every interval pace from actual data.
MCL Sprain: Readiness Indicators Before You Cut Again
Straight-line running pain-free isn't cutting-ready. A valgus stress and lateral-load protocol with the readiness numbers research actually supports.
Meniscus Repair Return to Sport: Deep-Flexion Load and Pivot Readiness Benchmarks
Pain-free jogging after meniscus repair doesn't clear a deep squat or a pivot. The flexion-load and rotational benchmarks that actually predict a safe return.
Multi-Sensor Time-Sync Offset Is Corrupting Your Analysis: How to Find and Fix It
Force plate, IMU and video each start their own clock, and a 20ms gap between them can flip your phase timing and RSI. Here's how to catch and align it.
Measuring the Nordic Hamstring Break-Point Angle: Protocol, Norms, and What It Predicts
Peak force on a NordBord misses who is actually at risk. Measure break-point angle instead: the exact knee angle where eccentric control fails.
Patellar Tendinopathy: Jump-Load Milestones for Returning to Sport
Pain during jumping isn't automatically a setback. A staged jump-load progression with 0-10 pain rules and VISA-P/hop-symmetry cutoffs for return to sport.
Pole Vault Runway Velocity Timing-Gate Protocol: Measuring the Final Six Strides
Pole vault runway speed timing usually means one flying gate near the box. A stride-by-stride protocol for the last six strides catches what that average hides.
Quadriceps Strain Return to Kicking: Pain-Free Isometric and Kick-Power Benchmarks
Pain-free walking isn't clearance to kick. Isometric knee-extension and kick-velocity LSI cutoffs research supports before full-power kicking resumes.
Quarterback Throw Velocity Test: Tracking Release Speed and Arm-Slot Consistency Together
A quarterback throw velocity test that tracks arm-slot repeatability alongside speed in one session — protocol, benchmarks, and 2 cited throwing studies.
Radar Gun Cosine Angle Error Fix: Correcting Underread Pitch and Serve Speeds
A gun set up off the flight line reads 3-5 mph slow and nobody notices. Here is the cosine error formula, the 10-degree rule, and how to correct old readings.