Sport Terrain Testing III: Rotational Resistance

The rotational resistance is a critical parameter for the health of players, so it is essential to measure it.

European Standard EN 15301-1:2008 specifies methods for the determination of the rotational resistance of sports surfaces.

In the following video we explain how the test is carried out:

The rotational resistance represents the traction exerted by the player on the turf when turning on his own axis. For this purpose, this tool measures the torque between an artificial sole weighing more than 35 kg and the ground. By twisting it through a torque spanner value is obtained.

The optimum range for football pitches should be between 45 and 60 Nm to ensure the health of the player.

There are different variables and, among all of them, they define the rotational resistance, although the most important is the species and its health.

Species that display stolons as part of their reproduction or deep roots have very high torsional strengths, for example:

• Species such as Bermuda with a strong root system offer high rotational resistance values. The turf does not break down as easily as needed to ensure freedom from injury.
• Other species such as the Ray grass English instead has a generally lower value. This allows it to break, making it easier to make sharp turns without the risk of damage to a joint.

Thus, the best option to obtain adequate rotational resistance is a mixture of species. Combinations can provide surfaces adapted to the local climate and also meet the necessary safety requirements.

Tiloom can help you determine the Rotational Resistance of your sports surface and correct it if necessary. In addition, we can also help you choose the perfect seed mix for your field.

The rotational resistance device can be purchased on our website via the following link:

Portable tensile testing apparatus standard version

A simpler, more portable version is also available:

Portable Tensile Tester

Make better decisions with us, our top quality services and our more than 15 years of experience in Football and Golf are our guarantee:

• Audit and monitoring service for sports grounds.
• Reading of laboratory analyses.
• Online support service.