“…In the scientific literature, only a few serious biomechanical studies have been published investigating the differences in mechanical load between NW, W, and R. In this context, Brunelle and Miller (1998) found that, at the same speed, the vertical ground reaction forces during landing are higher for NW compared with W. This result has been confirmed by a study conducted by Rist et al (2004). Jöllenbeck et al (2006) as well as Thorwesten et al (2006) also showed that there is no reduction of the vertical ground reaction force in NW compared with W. In addition, Hagen et al (2006) found that, except for the second peak of vertical force, NW results in higher loading rates and horizontal forces compared with ordinary W. Furthermore, Franz et al (2006) reported no differences between NW and W in knee external rotation moments and knee flexion moments. In contrast to W and NW, R, at the same speed, results in 30% greater vertical force and is characterized by higher knee loading (up to 40%) in comparison with NW (Schwameder & Ring, 2006).…”