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Biomechanical Adapt...
Biomechanical Adaptations and Performance Indicators in Short Trail Running
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- Björklund, Glenn, 1972- (författare)
- Mittuniversitetet,Institutionen för hälsovetenskap,The Swedish Sports Confederation, Stockholm, Sweden,Nationellt Vintersportcentrum,Mid Sweden Univ, Dept Hlth Sci, Swedish Winter Sports Res Ctr, Ostersund, Sweden.;Swedish Sports Confederat, Stockholm, Sweden.,Mittuniversitetet, Institutionen för hälsovetenskap
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- Svarén, Mikael (författare)
- KTH,Skolan för teknikvetenskap (SCI),Kungliga Tekniska Högskolan
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- Born, Dennis-Peter (författare)
- Swiss Fed Inst Sport, Dept Elite Sport, Magglingen, Switzerland.,Swiss Federal Institute of Sport, Magglingen, Switzerland
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- Stöggl, Thomas, 1977- (författare)
- Univ Salzburg, Dept Sport & Exercise Sci, Salzburg, Austria.,University of Salzburg, Salzburg, Austria,Nationellt Vintersportcentrum
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(creator_code:org_t)
- 2019-04-30
- 2019
- Engelska.
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Ingår i: Frontiers in Physiology. - : Frontiers Media S.A.. - 1664-042X. ; 10
- Relaterad länk:
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https://www.frontier...
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https://doi.org/10.3...
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https://miun.diva-po... (primary) (Raw object)
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https://du.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Our aims were to measure anthropometric and oxygen uptake ((V)over dot O-2) variables in the laboratory, to measure kinetic and stride characteristics during a trail running time trial, and then analyse the data for correlations with trail running performance. Runners (13 men, 4 women: mean age: 29 +/- 5 years; stature: 179.5 +/- 0.8 cm; body mass: 69.1 +/- 7.4 kg) performed laboratory tests to determine (V)over dot O-2 (max), running economy (RE), and anthropometric characteristics. On a separate day they performed an outdoor trail running time trial (two 3.5 km laps, total climb: 486 m) while we collected kinetic and time data. Comparing lap 2 with lap 1 (19:40 +/- 1:57 min vs. 21:08 +/- 2:09 min, P < 0.001), runners lost most time on the uphill sections and least on technical downhills (-2.5 +/- 9.1 s). Inter-individual performance varied most for the downhills (CV > 25%) and least on flat terrain (CV < 10%). Overall stride cycle and ground contact time (GCT) were shorter in downhill than uphill sections (0.64 +/- 0.03 vs. 0.84 +/- 0.09 s; 0.26 +/- 0.03 vs. 0.46 +/- 0.90 s, both P < 0.001). Force impulse was greatest on uphill (248 +/- 46 vs. 175 +/- 24 Ns, P < 0.001) and related to GCT (r = 0.904, P < 0.001). Peak force was greater during downhill than during uphill running (1106 +/- 135 vs. 959 +/- 104 N, P < 0.01). Performance was related to absolute and relative (V)over dot O-2 (max) (P < 0.01), vertical uphill treadmill speed (P < 0.001) and fat percent (P < 0.01). Running uphill involved the greatest impulse per step due to longer GCT while downhill running generated the highest peak forces. (V)over dot O-2 (max), vertical running speed and fat percent are important predictors for trail running performance. Performance between runners varied the most on downhills throughout the course, while pacing resembled a reversed J pattern. Future studies should focus on longer competition distances to verify these findings and with application of measures of 3D kinematics.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- downhill running
- foot forces
- ground contact time
- pacing
- stride frequency
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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