Blar i Brage NIH på forfatter "Spörri, Jörg"
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A new training assessment method for alpine ski racing: Estimating center of mass trajectory by fusing inertial sensors with periodically available position anchor points
Fasel, Benedikt; Gilgien, Matthias; Spörri, Jörg; Aminian, Kamiar (Journal article; Peer reviewed, 2018)In this study we present and validate a method to correct velocity and position drift for inertial sensor-based measurements in the context of alpine ski racing. Magnets were placed at each gate and their position determined ... -
Application of dGNSS in alpine ski racing: Basis for evaluating physical demands and safety
Gilgien, Matthias; Kröll, Josef; Spörri, Jörg; Crivelli, Philip; Müller, Erich (Journal article; Peer reviewed, 2018)External forces, such as ground reaction force or air drag acting on athletes' bodies in sports, determine the sport-specific demands on athletes' physical fitness. In order to establish appropriate physical conditioning ... -
Characterization of course and terrain and their effect on skier speed in World Cup alpine ski racing.
Gilgien, Matthias; Crivelli, Philip; Spörri, Jörg; Kröll, Josef; Müller, Erich (Journal article; Peer reviewed, 2015-03-11)World Cup (WC) alpine ski racing consists of four main competition disciplines (slalom, giant slalom, super-G and downhill), each with specific course and terrain characteristics. The International Ski Federation (FIS) has ... -
Effect of ski geometry and standing height on kinetic energy: equipment designed to reduce risk of severe traumatic injuries in alpine downhill ski racing.
Gilgien, Matthias; Spörri, Jörg; Kröll, Josef; Müller, Erich (Journal article; Peer reviewed, 2016)Background: Injuries in downhill (DH) are often related to high speed and, therefore, to high energy and forces which are involved in injury situations. Yet to date, no study has investigated the effect of ski geometry and ... -
Effect of ski geometry on aggressive ski behaviour and visual aesthetics: equipment designed to reduce risk of severe traumatic knee injuries in alpine giant slalom ski racing.
Kröll, Josef; Spörri, Jörg; Gilgien, Matthias; Schwameder, Hermann; Müller, Erich (Journal article; Peer reviewed, 2015-11-24)Background/Aim: Aggressive ski-snow interaction is characterised by direct force transmission and difficulty of getting the ski off its edge once the ski is carving. This behaviour has been suggested to be a main contributor ... -
How to Prevent Injuries in Alpine Ski Racing: What Do We Know and Where Do We Go from Here
Spörri, Jörg; Kröll, Josef; Gilgien, Matthias; Müller, Erich (Journal article; Peer reviewed, 2016-08-01)Alpine ski racing is known to be a sport with a high risk of injury and a high proportion of time-loss injuries. In recent years, substantial research efforts with regard to injury epidemiology, injury etiology, potential ... -
Injury prevention in Super-G alpine ski racing through course design
Gilgien, Matthias; Crivelli, Philip; Kröll, Josef; Müller, Erich; Spörri, Jörg; Luteberget, Live (Peer reviewed; Journal article, 2021)In Super-G alpine ski racing mean speed is nearly as high as in Downhill. Hence, the energy dissipated in typical impact accidents is similar. However, unlike Downhill, on Super-G courses no training runs are performed. ... -
Mechanics of turning and jumping and skier speed are associated with injury risk in men's World Cup alpine skiing: a comparison between the competition disciplines
Gilgien, Matthias; Spörri, Jörg; Kröll, Josef; Crivelli, Philip; Müller, Erich (Journal article; Peer reviewed, 2014-01-31)Background/aim: In alpine ski racing, there is limited information about skiers’ mechanical characteristics and their relation to injury risk, in particular for World Cup (WC) competitions. Hence, current findings from ... -
Sidecut radius and kinetic energy: equipment designed to reduce risk of severe traumatic knee injuries in alpine giant slalom ski racing.
Kröll, Josef; Spörri, Jörg; Gilgien, Matthias; Schwameder, Hermann; Müller, Erich (Journal article; Peer reviewed, 2016-02-04)Background: Kinetic energy (Ekin) increases with speed by the power of 2 and is considered a major risk factor for injuries in alpine ski racing. There is no empirical knowledge about the effect of ski geometry on Ekin. ... -
Sidecut radius and the mechanics of turning—equipment designed to reduce risk of severe traumatic knee injuries in alpine giant slalom ski racing.
Spörri, Jörg; Kröll, Josef; Gilgien, Matthias; Müller, Erich (Journal article; Peer reviewed, 2016)Background: There is limited empirical knowledge about the effect of ski geometry, particularly in the context of injury prevention in alpine ski racing. We investigated the effect of sidecut radius on biomechanical variables ... -
Three-dimensional body and centre of mass kinematics in alpine ski racing using differential GNSS and inertial sensors
Fasel, Benedikt; Spörri, Jörg; Gilgien, Matthias; Boffi, Geo; Chardonnens, Julien; Müller, Erich; Aminian, Kamiar (Journal article; Peer reviewed, 2016-08-22)A key point in human movement analysis is measuring the trajectory of a person’s center of mass (CoM). For outdoor applications, differential Global Navigation Satellite Systems (GNSS) can be used for tracking persons since ...