El impacto inicial con antepié incrementa la actividad muscular del gastrocnemios durante la carrera. Un estudio cuantitativo de actividad electromiográfica

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dc.coverageDOI: 10.47197/retos.v38i38.73955
dc.creatorValencia, Oscar
dc.creatorCristi, Iver
dc.creatorAhumada, Darío
dc.creatorMeza, Keiny
dc.creatorSalas, Rodrigo
dc.creatorWeinstein, Alejandro
dc.creatorGuzmán-Venegas, Rodrigo
dc.date2020
dc.date.accessioned2025-11-18T19:40:55Z
dc.date.available2025-11-18T19:40:55Z
dc.description<p>Running technique has an impact on lower limb injuries, particularly the initial contact pattern such as rearfoot (RF) or forefoot (FF). However, there is limited evidence of the electromyographic (EMG) activity for both conditions. The aim of this study was to compare the lower limb muscles EMG amplitude between RF and FF techniques during running. Thirteen runners were evaluated at a self-selected running speed under two conditions: initial contact with RF and FF. The myoelectric activity of the rectus femoris (RE), biceps femoris (BF), tibialis anterior (TA), medial gastrocnemius (GM) and lateral (GL) were analysed. The EMG amplitudes of 10 running cycles were averaged and normalized to the maximum voluntary contraction. The results included a significantly higher activation of GM and GL muscles for the FF condition during the stance phase, balance and the entire running cycle. In addition, TA showed higher activation during the swing phase and the 100% running cycle for the RP condition. No other significant differences were found. In conclusion, FF technique increases GM and GL myoelectric activity, possibly associated with a higher impact absorption during the stance phase. On the other hand, TA increases its activity for RF condition which may imply a greater neuromuscular control prior to initial contact. Finally, the running technique is presented as a modifiable condition which can be changed to enhance performance or in pathologic circumstances.</p>eng
dc.descriptionRunning technique has an impact on lower limb injuries, particularly the initial contact pattern such as rearfoot (RF) or forefoot (FF). However, there is limited evidence of the electromyographic (EMG) activity for both conditions. The aim of this study was to compare the lower limb muscles EMG amplitude between RF and FF techniques during running. Thirteen runners were evaluated at a self-selected running speed under two conditions: initial contact with RF and FF. The myoelectric activity of the rectus femoris (RE), biceps femoris (BF), tibialis anterior (TA), medial gastrocnemius (GM) and lateral (GL) were analysed. The EMG amplitudes of 10 running cycles were averaged and normalized to the maximum voluntary contraction. The results included a significantly higher activation of GM and GL muscles for the FF condition during the stance phase, balance and the entire running cycle. In addition, TA showed higher activation during the swing phase and the 100% running cycle for the RP condition. No other significant differences were found. In conclusion, FF technique increases GM and GL myoelectric activity, possibly associated with a higher impact absorption during the stance phase. On the other hand, TA increases its activity for RF condition which may imply a greater neuromuscular control prior to initial contact. Finally, the running technique is presented as a modifiable condition which can be changed to enhance performance or in pathologic circumstances. © 2020 Federacion Espanola de Docentes de Educacion Fisica. All rights reserved.spa
dc.identifierhttps://investigadores.uandes.cl/en/publications/4f4ce3b6-7c32-44a3-9b22-e80279104112
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/51540
dc.languagepor
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.sourcevol.83 (2020) p.271-275
dc.subjectForefoot
dc.subjectMuscle activity
dc.subjectRearfoot
dc.subjectRunning
dc.subjectcarrera
dc.subjectactividad muscular
dc.subjectantepié
dc.subjectretropié
dc.titleEl impacto inicial con antepié incrementa la actividad muscular del gastrocnemios durante la carrera. Un estudio cuantitativo de actividad electromiográficapor
dc.titleThe initial impact with forefoot increases the muscular activity of gastrocnemius during running. A quantitative study of electromyographic activityeng
dc.titleThe initial impact with forefoot increases the muscular activity of gastrocnemius during running. A quantitative study of electromyographic activityspa
dc.typeArticleeng
dc.typeArtículospa
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