Traction on FieldTurf
Rotational Traction Values on FieldTurf Revolution
The following list contains rotational traction values of various shoes tested on FieldTurf Revolution.
The colors in the table below represent each shoe's traction value relative to the other shoes tested on FieldTurf Revolution, with red being the highest and green being the lowest.
It is important to note the HSD (Honestly Significant Difference) value at the bottom of the table. This number is determined via statistical testing and is used when comparing traction values. Traction values that are within the HSD value (10.8) are not statistically different. For example, a shoe with a traction value of 100 Nm is not statistically different from a shoe with a traction value of 90 Nm, because the difference is less than 10.8.
*HSD: Tukey Honestly Significant Difference Test. Traction means within the value listed are not statistically different from one another.
Interpretation of Results
Rotational traction measured with mechanical devices such as Pennfoot allow for comparisons among shoe-types and playing surfaces; however, 'safe' and 'unsafe' traction levels have not been established in the scientific community, as this type of data has not been directly correlated with injury risk. Although researchers have yet to establish 'safe' threshold levels, it is generally accepted that low levels of rotational traction are desired over high levels from a lower extremity injury risk standpoint (Lambson et al., 1996). However, if traction is too low, playability may be reduced as athletes may be prone to slipping, thus increasing potential for other types of injuries.
Rotational traction values are presented in Newton-meters (Nm), which is the standard rotational traction unit (ASTM, 2009).
Traction data (four measurements per each shoe-surface combination) were analyzed for each playing surface using Analysis of Variance (ANOVA). Tukey's Honestly Significant Differences (HSD) test was used for means separation at the alpha = 0.05 level. It is important to note that traction values within the HSD value listed are not statistically different from one another.