ground contact time
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.
Jump Mat Contact Time Error From Floor Flex: Why Sprung Floors Inflate Your Numbers
A sprung or suspended floor under your jump mat can stretch measured contact time and quietly deflate RSI. Here's how to spot it and fix the setup.
Fixing Accelerometer Clipping in High-Impact Plyometrics
Hard drop jump landings can exceed your sensor's g-range, clipping the signal and skewing ground contact time and RSI. Here's how to set the range right.
IMU Sampling Rate Too Low for Plyometrics: How to Diagnose and Fix It
Ground contact under 200ms needs real timing resolution. See how low IMU sampling rate creates quantization errors that skew RSI, and the minimum Hz to use.
Fixing IMU Step Count Errors on Turf Sprints: Retuning Thresholds for Short Contact and Slip
IMU step counts drop on turf sprints when short ground contact and foot slip weaken the impact signal below your detection threshold. Here's the fix.
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.