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Isometric pre-conditioning blunts exercise-induced muscle damage but does not attenuate changes in running economy following downhill running.
Hum Mov Sci. 2018 Aug; 60:1-9.HM

Abstract

Running economy (RE) is impaired following unaccustomed eccentric-biased exercises that induce muscle damage. It is also known that muscle damage is reduced when maximal voluntary isometric contractions (MVIC) are performed at a long muscle length 2-4 days prior to maximal eccentric exercise with the same muscle, a phenomenon that can be described as isometric pre-conditioning (IPC). We tested the hypothesis that IPC could attenuate muscle damage and changes in RE following downhill running. Thirty untrained men were randomly assigned into experimental or control groups and ran downhill on a treadmill (-15%) for 30 min. Participants in the experimental group completed 10 MVIC in a leg press machine two days prior to downhill running, while participants in the control group did not perform IPC. The magnitude of changes in muscle soreness determined 48 h after downhill running was greater for the control group (122 ± 28 mm) than for the experimental group (92 ± 38 mm). Isometric peak torque recovered faster in the experimental group compared with the control group (3 days vs. no full recovery, respectively). No significant effect of IPC was found for countermovement jump height, serum creatine kinase activity or any parameters associated with RE. These results supported the hypothesis that IPC attenuates changes in markers of muscle damage. The hypothesis that IPC attenuates changes in RE was not supported by our data. It appears that the mechanisms involved in changes in markers of muscle damage and parameters associated with RE following downhill running are not completely shared.

Authors+Show Affiliations

Human Performance Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil; Faculty of Biological and Health Sciences, Centro Universitário Hermínio Ometto, Av. Maximiliano Baruto, 500, Araras, SP 13607-339, Brazil; Faculty of Physical Education, Centro Universitário Salesiano de São Paulo, Rua Baronesa Geraldo Resende, 330, Campinas, SP 13075-270, Brazil. Electronic address: leonardocrlima@gmail.com.Human Performance Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil.Biomechanics Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil. Electronic address: adalgiso@rc.unesp.br.Biomechanics Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil.Human Performance Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil. Electronic address: grecocc@rc.unesp.br.Human Performance Laboratory, São Paulo State University, Av 24-A, 1515, Rio Claro, SP 13506-900, Brazil. Electronic address: bdenadai@rc.unesp.br.

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

29751254

Citation

Lima, Leonardo C R., et al. "Isometric Pre-conditioning Blunts Exercise-induced Muscle Damage but Does Not Attenuate Changes in Running Economy Following Downhill Running." Human Movement Science, vol. 60, 2018, pp. 1-9.
Lima LCR, Bassan NM, Cardozo AC, et al. Isometric pre-conditioning blunts exercise-induced muscle damage but does not attenuate changes in running economy following downhill running. Hum Mov Sci. 2018;60:1-9.
Lima, L. C. R., Bassan, N. M., Cardozo, A. C., Gonçalves, M., Greco, C. C., & Denadai, B. S. (2018). Isometric pre-conditioning blunts exercise-induced muscle damage but does not attenuate changes in running economy following downhill running. Human Movement Science, 60, 1-9. https://doi.org/10.1016/j.humov.2018.05.002
Lima LCR, et al. Isometric Pre-conditioning Blunts Exercise-induced Muscle Damage but Does Not Attenuate Changes in Running Economy Following Downhill Running. Hum Mov Sci. 2018;60:1-9. PubMed PMID: 29751254.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Isometric pre-conditioning blunts exercise-induced muscle damage but does not attenuate changes in running economy following downhill running. AU - Lima,Leonardo C R, AU - Bassan,Natália M, AU - Cardozo,Adalgiso C, AU - Gonçalves,Mauro, AU - Greco,Camila C, AU - Denadai,Benedito S, Y1 - 2018/05/09/ PY - 2018/02/02/received PY - 2018/04/30/revised PY - 2018/05/02/accepted PY - 2018/5/12/pubmed PY - 2018/10/30/medline PY - 2018/5/12/entrez KW - Decline running KW - Eccentric exercise KW - Exercise prophylaxis KW - Maximal voluntary contractions KW - Myofibrilar disruption KW - Running efficiency SP - 1 EP - 9 JF - Human movement science JO - Hum Mov Sci VL - 60 N2 - Running economy (RE) is impaired following unaccustomed eccentric-biased exercises that induce muscle damage. It is also known that muscle damage is reduced when maximal voluntary isometric contractions (MVIC) are performed at a long muscle length 2-4 days prior to maximal eccentric exercise with the same muscle, a phenomenon that can be described as isometric pre-conditioning (IPC). We tested the hypothesis that IPC could attenuate muscle damage and changes in RE following downhill running. Thirty untrained men were randomly assigned into experimental or control groups and ran downhill on a treadmill (-15%) for 30 min. Participants in the experimental group completed 10 MVIC in a leg press machine two days prior to downhill running, while participants in the control group did not perform IPC. The magnitude of changes in muscle soreness determined 48 h after downhill running was greater for the control group (122 ± 28 mm) than for the experimental group (92 ± 38 mm). Isometric peak torque recovered faster in the experimental group compared with the control group (3 days vs. no full recovery, respectively). No significant effect of IPC was found for countermovement jump height, serum creatine kinase activity or any parameters associated with RE. These results supported the hypothesis that IPC attenuates changes in markers of muscle damage. The hypothesis that IPC attenuates changes in RE was not supported by our data. It appears that the mechanisms involved in changes in markers of muscle damage and parameters associated with RE following downhill running are not completely shared. SN - 1872-7646 UR - https://wwww.unboundmedicine.com/medline/citation/29751254/Isometric_pre_conditioning_blunts_exercise_induced_muscle_damage_but_does_not_attenuate_changes_in_running_economy_following_downhill_running_ DB - PRIME DP - Unbound Medicine ER -