Strength training and changes in the dynamics of running economy

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Title: Strength training and changes in the dynamics of running economy
Authors: Cacek, Jan | Tomáš, Kalina | Martin, Doležal
Keywords: Oxygen uptake | Acute effect | Plyometric | Maximum power
Knowledge Area: Educación Física y Deportiva
Issue Date: 2014
Publisher: Universidad de Alicante. Área de Educación Física y Deporte
Citation: Journal of Human Sport and Exercise. 2014, 9(Proc1): S467-S473. doi:10.14198/jhse.2014.9.Proc1.34
Abstract: The aim of this study was to examine an acute effect of 4RM training and plyometric training (PT) on running economy (RE; O2 consumption) in endurance runners during a 48 hour interval. Eight performance runners (age 25.4±1.4 years) completed a maximum strength training (4RM) of lower limbs (3 sets, rest 2 min, 5 exercises) and subsequently underwent a RE test on a treadmill (speed 8, 10 and 12 km·h-1) at three time intervals (0, +24 and +48 h) after the training. We found that the average VO2·BM-1·min-1 and ΔVO2·BM-1·min-1 at the given speed increased from baseline (a pretest 48 h before the strength intervention) by 2.3-5.6% and culminated after 24 h. These changes in RE after the strength intervention were not statistically significant, when compared to the pretest (48 h before the intervention). The second investigation was conducted in seven runners (age 25±1.6 years). This time the intervention was plyometric (7 sec load, rest 2 min, maximum intensity, 3 sets, 6 exercises on the dominant lower limb). We found that the average VO2·BM-1·min-1 and ΔVO2·BM-1·min-1 at given speeds at intervals 0, +24 and +48 h did not increase, when compared to the pretest (p < 0.05; max +1%). These minimal changes probably resulted from the design of the PT, which had not a sufficiently destructive effect on muscle cells. The comparison of these two investigations indicates a stronger (although statistically insignificant) deterioration of RE after 4RM training versus PT.
Sponsor: This investigation was conducted within the framework of a specific students’ research at the Masaryk University 0790/2012 "Factors affecting the economy of running (the effect of explosive strength training and stretching acutely applied before performance on the economy of running) II".
URI: http://dx.doi.org/10.14198/jhse.2014.9.Proc1.34 | http://hdl.handle.net/10045/45217
ISSN: 1988-5202
DOI: 10.14198/jhse.2014.9.Proc1.34
Language: eng
Type: info:eu-repo/semantics/article
Rights: Licencia Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0
Peer Review: si
Publisher version: http://www.jhse.ua.es
Appears in Collections:Revistas - Journal of Human Sport and Exercise - 2014 - 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013

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