Characterisation of skiers’ mechanics, course setting and terrain geomorphology in World Cup Alpine Skiing using global navigation satellite systems: Injury risk, performance and methodological aspects
Doctoral thesis
Permanent lenke
http://hdl.handle.net/11250/195750Utgivelsesdato
2014Metadata
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Sammendrag
This study was undertaken to characterize course setting, terrain geomorphology and skier
mechanics in World Cup (WC) alpine skiing. Since there was no existing appropriate
methodology to capture skier mechanics across large capture volumes under WC racing
conditions in speed disciplines, a novel method was invented. The method was based on a global
navigation satellite system (GNSS) and was tailored to assess position, velocity, acceleration and
external forces while causing minimal interference to the athlete. The method was assessed in a
field study against an independent reference system and found valid to assess skier position,
velocity, acceleration and external forces in WC alpine skiing. Furthermore, the position results of
five different geodetic GNSS methods were compared to an independent reference system. The
comparison revealed that differential GNSS applying GPS and GLONASS satellite systems and
the satellite signal frequencies L1 and L2 was the only configuration which consistently yielded
postion results that were accurate enough to capture alpine skiing under WC conditions. Paper I: Tatt ut av filen i Brage p.g.a. copyright-restriksjoner. / Not in the file in Brage because of copyright issues. Paper II: Determination of external forces in alpine skiing using a differential Global
Navigation Satellite System. Published in Sensors (Physical Sensors), Basel (http://www.mdpi.com/1424-8220/13/8/9821). Paper III: Tatt ut av filen i Brage p.g.a. copyright-restriksjoner. / Not in the file in Brage because of copyright issues. Paper IV: Tatt ut av filen i Brage p.g.a. copyright-restriksjoner. / Not in the file in Brage because of copyright issues. Paper V: Tatt ut av filen i Brage p.g.a. copyright-restriksjoner. / Not in the file in Brage because of copyright issues.
Beskrivelse
Avhandling (doktorgrad) - Norges idrettshøgskole, 2014