Steinar Braaten's scientific contributions
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Publications (4)
This study investigated the explanatory power of a sensor fusion of two complementary methods to explain performance and its underlying mechanisms in ski jumping. A differential Global Navigation Satellite System (dGNSS) and a markerless video-based pose estimation system (PosEst) were used to measure the kinematics and kinetics from the start of t...
Imitation jumps are frequently used in training for ski jumping. Yet, the dynamics of these jumps differ considerably. Thus, the relevance of imitation jumps for ski jumping performance is not elucidated. The aim of this study was to investigate the relationship between the technical execution of imitation jumps and ski jumping performance level. W...
The performance of the take-off in ski jumping creates high demands on the athlete’s neuromuscular system and is associated with the length of the jump. However, investigations of muscle activity during take-off are limited to a few qualitative analyses as summarized by Schwameder (2008). A principal component analysis (PCA) can quantify relevant a...
We examined the effect of boundary conditions in imitation ski jumping on movement dynamics and coordination. We compared imitation ski jumps with - and without - the possibility to generate shear propulsion forces. Six elite ski jumpers performed imitation jumps by jumping from a fixed surface and from a rolling platform. The ground reaction force...
Citations
... Sensor technology opens up exciting opportunities for sports. For example, advancements in motion tracking devices allow monitoring athletes' movement patterns indoors and outdoors [1][2][3]. Wearable sensors offer insightful information on the demands of the sport during both training and competition [4]. Such data are important for coaches and athletes to optimize their training plan, minimize the risk of injuries, and improve sport performance. ...
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... The steady glide phase lasts for as long as the -ratio is in a steady state, and the landing preparation ranges from where the steady glide ends until the ski jumper reengages with the ground (Elfmark et al., 2022). The take-off and glide preparation are considered the most important parts of a ski jump because the initial conditions for the steady glide phase are created here and these conditions are assumed impossible to correct at a later stage (Schwameder, 2008;Virmavirta et al., 2009;Ettema et al., 2020;Elfmark and Ettema, 2021;Virmavirta, 2016). Thus, there is some consensus that while a ski jumper cannot win with * Corresponding author. ...
... Even if the angular results show that the athlete reaches a stable position in this phase, the F L /F D ratio varies considerably for the complete phase, which will be addressed in Section 3.3. The angular velocities presented in Figure 12b are in the range of earlier lab and field studies [2,54]. Virmavirta et al. [2] found a correlation between the angular velocity of the hip at the release instant and the jump distance. ...
