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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

BLOOD FLOW RESTRICTION INCREASES METABOLIC STRESS BUT DECREASES MUSCLE ACTIVATION DURING HIGH-LOAD RESISTANCE EXERCISE

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Author(s):
Teixeira, Emerson L. [1] ; Barroso, Renato [2] ; Silva-Batista, Carla [1] ; Laurentino, Gilberto C. [1] ; Loenneke, Jeremy P. [3] ; Roschel, Hamilton [1] ; Ugrinowitsch, Carlos [1] ; Tricoli, Valmor [1]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Sch Phys Educ & Sport, Ave Prof Mello Moraes 65, BR-05508030 Sao Paulo, SP - Brazil
[2] Univ Estadual Campinas, Fac Phys Educ, Campinas, SP - Brazil
[3] Univ Mississippi, Kevser Ermin Appl Physiol Lab, Dept Hlth Exercise Sci & Recreat Management, Oxford, MS - USA
Total Affiliations: 3
Document type: Journal article
Source: MUSCLE & NERVE; v. 57, n. 1, p. 107-111, JAN 2018.
Web of Science Citations: 4
Abstract

Introduction: We investigated differences in metabolic stress (lactate) and muscle activation (electromyography; EMG) when high-load resistance exercise (HL) is compared with a condition in which blood flow restriction (BFR) is applied during the exercise or during the rest interval. Methods: Twelve participants performed HL with BFR during the intervals (BFRI), during the set (BFR-S), and without BFR. Each condition consisted of 3 sets of 8 repetitions with knee extension at 70% of 1-repetition maximum. Lactate and root mean square (RMS) from the surface EMG of the vastus lateralis were calculated. Results: Lactate increased in all protocols but was higher with BFR-I than with BFR-S and HL. RMS decreased under all conditions, with a larger effect size in BFR-I (1.47) than in BFR-S (0.66) and HL (0.59). Discussion: BFR-I increases lactate, possibly as a result of reduced restoration of ATP. Muscle activation seems to be impacted by mechanical stress but may be reduced by metabolic stress. (AU)

FAPESP's process: 14/20369-1 - Effects of blood flow restriction during inter-set rest interval in high-intensity resistance training on muscular activation and metabolic stress
Grantee:Renato Barroso da Silva
Support Opportunities: Regular Research Grants