Measuring Traction
📌 Using a Studded (Rotational) Traction Tester
This is the standard and most accurate method for assessing traction on natural and synthetic turf.
🗝️ How it works
A device with studs similar to a player’s boot is placed on the turf.
The device applies a downward load (to simulate bodyweight).
The traction tester is then rotated, and the torque required to cause rotational slip is measured.
📝 What is measured
Rotational resistance / torque value
Usually expressed in Newton-meters (Nm).Lower values = less grip
Higher values = more grip (but too high = injury risk)
👉 Acceptable ranges (typical)
Football (natural turf): 25–50 Nm
Rugby: similar range, with some allowances for higher values