Running Mechanics During the World's Most Challenging Mountain Ultramarathon
The aim of study was to examine the effects of the world's most challenging mountain ultramarathon (Tor des Géants [TdG]) on running mechanics. Mechanical measurements were undertaken in male runners (n = 16) and a control group (n = 8) before (PRE), during (MID), and after (POST) the TdG. Cont...
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| Veröffentlicht in: | International journal of sports physiology and performance 2016-07, Vol.11 (5), p.608-614 |
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| container_title | International journal of sports physiology and performance |
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| creator | Degache, Francis Morin, Jean-Benoît Oehen, Lukas Guex, Kenny Giardini, Guido Schena, Federico Millet, Guillaume Y Millet, Grégoire P |
| description | The aim of study was to examine the effects of the world's most challenging mountain ultramarathon (Tor des Géants [TdG]) on running mechanics. Mechanical measurements were undertaken in male runners (n = 16) and a control group (n = 8) before (PRE), during (MID), and after (POST) the TdG. Contact (tc) and aerial (ta) times, step frequency (f), and running velocity (v) were sampled. Spring-mass parameters of peak vertical ground-reaction force (Fmax), vertical downward displacement of the center of mass (Δz), leg-length change (ΔL), and vertical (kvert) and leg (kleg) stiffness were computed. Significant decreases were observed in runners between PRE and MID for ta (P < .001), Fmax (P < .001), Δz (P < .05), and kleg (P < .01). In contrast, f significantly increased (P < .05) between PRE and MID-TdG. No further changes were observed at POST for any of those variables, with the exception of kleg, which went back to PRE. During the TdG, experienced runners modified their running pattern and spring-mass behavior mainly during the first half. The current results suggest that these mechanical changes aim at minimizing the pain occurring in lower limbs mainly during the eccentric phases. One cannot rule out that this switch to a "safer" technique may also aim to anticipate further damages. |
| doi_str_mv | 10.1123/ijspp.2015-0238 |
| format | Article |
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Mechanical measurements were undertaken in male runners (n = 16) and a control group (n = 8) before (PRE), during (MID), and after (POST) the TdG. Contact (tc) and aerial (ta) times, step frequency (f), and running velocity (v) were sampled. Spring-mass parameters of peak vertical ground-reaction force (Fmax), vertical downward displacement of the center of mass (Δz), leg-length change (ΔL), and vertical (kvert) and leg (kleg) stiffness were computed. Significant decreases were observed in runners between PRE and MID for ta (P < .001), Fmax (P < .001), Δz (P < .05), and kleg (P < .01). In contrast, f significantly increased (P < .05) between PRE and MID-TdG. No further changes were observed at POST for any of those variables, with the exception of kleg, which went back to PRE. During the TdG, experienced runners modified their running pattern and spring-mass behavior mainly during the first half. The current results suggest that these mechanical changes aim at minimizing the pain occurring in lower limbs mainly during the eccentric phases. One cannot rule out that this switch to a "safer" technique may also aim to anticipate further damages.</description><identifier>ISSN: 1555-0265</identifier><identifier>EISSN: 1555-0273</identifier><identifier>DOI: 10.1123/ijspp.2015-0238</identifier><identifier>PMID: 26457730</identifier><language>eng</language><publisher>United States: Human Kinetics</publisher><subject>Adaptation, Physiological ; Adult ; Biomechanical Phenomena - physiology ; Case-Control Studies ; Humans ; Life Sciences ; Lower Extremity - physiology ; Male ; Muscle Fatigue - physiology ; Running ; Running - physiology ; Sleep Deprivation - physiopathology ; Ultramarathon</subject><ispartof>International journal of sports physiology and performance, 2016-07, Vol.11 (5), p.608-614</ispartof><rights>Copyright Human Kinetics Jul 2016</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c425t-1ab683066ab0be8c00423288aa7be39f20528a24aed68dc768948c0b2dfe2f523</citedby><orcidid>0000-0003-3808-6762 ; 0000-0002-6395-0762 ; 0000-0002-2052-5117</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,777,781,882,27905,27906</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26457730$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://univ-cotedazur.hal.science/hal-01858841$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Degache, Francis</creatorcontrib><creatorcontrib>Morin, Jean-Benoît</creatorcontrib><creatorcontrib>Oehen, Lukas</creatorcontrib><creatorcontrib>Guex, Kenny</creatorcontrib><creatorcontrib>Giardini, Guido</creatorcontrib><creatorcontrib>Schena, Federico</creatorcontrib><creatorcontrib>Millet, Guillaume Y</creatorcontrib><creatorcontrib>Millet, Grégoire P</creatorcontrib><title>Running Mechanics During the World's Most Challenging Mountain Ultramarathon</title><title>International journal of sports physiology and performance</title><addtitle>Int J Sports Physiol Perform</addtitle><description>The aim of study was to examine the effects of the world's most challenging mountain ultramarathon (Tor des Géants [TdG]) on running mechanics. 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The current results suggest that these mechanical changes aim at minimizing the pain occurring in lower limbs mainly during the eccentric phases. 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| subjects | Adaptation, Physiological Adult Biomechanical Phenomena - physiology Case-Control Studies Humans Life Sciences Lower Extremity - physiology Male Muscle Fatigue - physiology Running Running - physiology Sleep Deprivation - physiopathology Ultramarathon |
| title | Running Mechanics During the World's Most Challenging Mountain Ultramarathon |
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