Tibial accelerations during snowboarding jump landings: A pilot study

Results Average peak tibial accelerations were found to be quite variable during snowboard landings. Subject 1's peak accelerations were 17.5 ± 5.7 g's (range: 9.5 - 23.6 g) and 19.5 ± 11.2 g's (range: 3.4 - 36.4 g) for the front and back leg. Looking at the timing of the impact peaks, subject 1 landed tail first 60% of the time followed by flat 20% and nose first 20%. For subject 2, average peaks were found to be 25.1 ± 12.2 g's (range: 10.5 - 41.9 g) and 26.9 ± 12.7 g's (range: 12.0 - 42.8 g) for the front and back leg respectively. Subject 2 landed flat 50% of the time followed by nose first 30% and tail first 20%. Both subjects had similar average air times (time between take off and landing) of 801 ± 76 ms. In-boot pressure data revealed most of the pressure was localized underneath the medial portion of the calcaneal bone during the moment of peak tibial acceleration.