Five Weeks of Sprint Interval Training Improve Muscle Glycolytic Content and Activity But Not Time to Task Failure in Severe-Intensity Exercise.
Purpose: This study examined the impact of a 5-wk sprint interval training (SIT) intervention on time to task failure (TTF) during severe-intensity constant work rate (CWR) exercise, as well as in glycolytic enzymatic content and activity, and glycogen content. Methods: Fourteen active males were ra...
| Publicado en: | Medicine & Science in Sports & Exercise Vol. 56; no. 8; pp. 1355 - 1368 |
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| Autores principales: | , , , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
Aug2024
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=178668657&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 178668657 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01959131 4DP jtl: Medicine & Science in Sports & Exercise issn: 01959131 maglogo: N pubinfo: dt: Aug2024 vid: 56 iid: 8 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 178668657 178668657 178668657 10.1249/MSS.0000000000003425 178668657 ppf: 1355 ppct: 13 formats: tig: atl: Five Weeks of Sprint Interval Training Improve Muscle Glycolytic Content and Activity But Not Time to Task Failure in Severe-Intensity Exercise. aug: au: BONETTI DE POLI, RODRIGO ARAUJO MANUEL MURIAS, JUAN MOURA ANTUNES, BARBARA MARINARI, GABRIELE MEDEIROS DUTRA, YAGO MILIONI, FABIO MOURA ZAGATTO, ALESSANDRO affil: Laboratory of Physiology and Sport Performance (LAFIDE), Graduate Program in Movement Sciences, São Paulo State University (UNESP), School of Sciences. Bauru, BRAZIL sug: subj: High-Intensity Interval Training Training Effect (Physiology) Enzymes Muscle Proteins Task Performance and Analysis Human Descriptive Statistics Data Analysis Software Confidence Intervals Odds Ratio Analysis of Variance Post Hoc Analysis T-Tests Experimental Studies Exercise Tolerance Male Female Adult Adult: 19-44 years Male Female ab: Purpose: This study examined the impact of a 5-wk sprint interval training (SIT) intervention on time to task failure (TTF) during severe-intensity constant work rate (CWR) exercise, as well as in glycolytic enzymatic content and activity, and glycogen content. Methods: Fourteen active males were randomized into either a SIT group (n = 8) composed of 15 SIT sessions over 5 wk, or a control group (n = 6). At pretraining period, participants performed i) ramp incremental test to measure the cardiorespiratory function; ii) CWR cycling TTF at 150%of the power output (PO) at the respiratory compensation point (RCP-PO) with muscle biopsies at rest and immediately following task failure. After 5 wk, the same evaluations were repeated (i.e., exercise intensities matched to current training status), and an additional cycling CWR matched to pretraining 150% RCP-PO was performed only for TTF evaluation. The content and enzymatic activity of glycogen phosphorylase (GPhos), hexokinase (HK), phosphofructokinase (PFK), and lactate dehydrogenase (LDH), as well as the glycogen content, were analyzed. Content ofmonocarboxylate transporter isoform 4 (MCT4) and muscle buffering capacity were also measured. Results: Despite improvements in total work performed at CWR posttraining, no differences were observed for TTF. The GPhos, HK, PFK, and LDHcontent and activity, and glycogen content also improved after training only in the SIT group. Furthermore, theMCT4 concentrations andmuscle buffering capacitywere also improved only for the SIT group. However, no difference in glycogen depletion was observed between groups and time. Conclusions: Five weeks of SIT improved the glycolytic pathway parameters and total work performed; however, glycogen depletion was not altered during CWR severe-intensity exercise, and TTF remained similar. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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