20.500.12556/RUL-127812 Whole-body vibrations associated with alpine skiing a risk factor for low back pain? Alpine skiing, both recreational and competitive, is associated with high rates of injury. Numerous studies have shown that occupational exposure to whole-body vibrations is strongly related to lower back pain and some suggest that, in particular, vibrations of lower frequencies could lead to overuse injuries of the back in connection with alpine ski racing. However, it is not yet known which forms of skiing involve stronger vibrations and whether these exceed safety thresholds set by existing standards and directives. Therefore, this study was designed to examine whole-body vibrations connected with different types of skiing and the associated potential risk of developing low back pain. Eight highly skilled ski instructors, all former competitive ski racers and equipped with five accelerometers and a Global Satellite Navigation System to measure vibrations and speed, respectively, performed six different forms of skiing: straight running, plowing, snow-plow swinging, basic swinging, short swinging, and carved turns. To estimate exposure to periodic, random and transient vibrations the power spectrum density (PSD) and standard ISO 2631-1:1997 parameters [i.e., the weighted root-mean-square acceleration (RMS), crest factor, maximum transient vibration value and the fourth-power vibration dose value (VDV)] were calculated. Ground reaction forces were estimated from data provided by accelerometers attached to the pelvis. The major novel findings were that all of the forms of skiing tested produced whole-body vibrations, with highest PSD values of 1.5–8 Hz. Intensified PSD between 8.5 and 35 Hz was observed only when skidding was involved. The RMS values for 10 min of short swinging or carved turns, as well as all 10-min equivalent VDV values exceeded the limits set by European Directive 2002/44/EC for health and safety. Thus, whole-body vibrations, particularly in connection with high ground reaction forces, contribute to a high risk for low back pain among active alpine skiers. biomechanics injury prevention kinematics kinetics recreational skiing shock ski racing biomehanika preprečevanje poškodb kinematika kinetika rekreativno smučanje tekmovalno smučanje true false true Angleški jezik Slovenski jezik Članek v reviji 2021-06-23 11:51:25 2021-06-23 11:51:26 2022-09-06 03:53:15 0000-00-00 00:00:00 2018 0 0 9 str. Vol. 9, art. 204 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 796.926:616-001 1664-042X 10.3389/fphys.2018.00204 5270449 RAZ_Supej_Matej_2018.pdf RAZ_Supej_Matej_2018.pdf 1 1D55CF53AC03810CF37AAA617947E854 5e60ffffc0451f826ac89604e3d8429b9ea4a9dfa9b7fe5a71021ea81d55c095 da0d737c-d423-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144360 https://www.frontiersin.org/articles/10.3389/fphys.2018.00204/full 0 7829265f-d408-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144357 Fakulteta za šport 0 0 0