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dc.contributor.authorRoberts, Llion A
dc.contributor.authorDavids, Charlie
dc.contributor.authorCoombes, Jeff
dc.contributor.authorPeake, Jonathan
dc.contributor.authorRaastad, Truls
dc.description.abstractResistance training (RT) with blood flow restriction (BFR) induces similar adaptations to traditional RT but uses markedly lower training loads. However, information about the acute exercise pressor, hemodynamic, and local metabolic cost of this training approach is sparse. These data are needed to understand the acute safety implications of this training approach and help identify an optimal BFR protocol. PURPOSE: To compare the acute central and systemic cardiovascular, and local metabolic responses to resistance exercise performed with continuous (BFR-C) and intermittent (BFR-I) BFR. METHODS: 12 resistance-trained males (mean ± SD) aged 22.3 ± 3.2yrs, 1.82 ± 0.06m, and 84.1 ± 9.0kg performed 4 separate acute resistance training sessions in a random order, each separated by 7 days. Training sessions involved four sets of squat-based RT at 30% of individuals’ 1 repetition maximum with 1) no BFR (CON), 2) BFR-C, 3) BFR-I, and 4) traditional high load training at 70% of 1 repetition maximum with no BFR (HL). Systemic blood pressure and derivatives of cardiac output, central aortic blood pressure pulse wave characteristics, and local blood volume and metabolism were assessed periodically during, and after each training session. Data were assessed by two-way ANOVA with Bonferroni-corrected post-hoc comparisons. RESULTS: All sessions similarly increase average metabolic demand, seen by a decreased tissue saturation index (-15%, 95% CI 13.3 to 17.4, p<0.0001) with no difference between conditions (p>0.05). Whilst changes in haemoglobin-derived Vastus Lateralis blood volumes were similar between conditions, they were higher with BFR-C than CON (6.97 μmol/L, 95% CI 0.2 to 13.6, p=0.04) and HL (7.9 μmol/L, 95% CI 1.2 to 14.8, p=0.01). Training equally increased mean systemic mean arterial pressure (MAP) (+70.5 to 76.6 mmHg, p<0.001) and cardiac output (+0.74 to 0.96 L, p<0.001) above baseline, with no difference between conditions. Training also equally increased mean aortic MAP (+14.8 to 24.2 mmHg, p<0.001) above baseline across conditions. CONCLUSIONS: BFR-C and BFR-I cause similar exercise pressor responses comparable with both traditional resistance training, and training without BFR. Adding BFR to resistance training didn’t exacerbate the magnitude or duration of the associated cardiovascular stress.en_US
dc.publisherLippincott Williams & Wilkinsen_US
dc.relation.ispartofconferencenameAmerican College of Sports Medicine (ACSM) Virtual Conferenceen_US
dc.relation.ispartofconferencetitleMedicine & Science in Sports & Exerciseen_US
dc.subject.fieldofresearchHuman Movement and Sports Sciencesen_US
dc.subject.fieldofresearchMedical Physiologyen_US
dc.subject.fieldofresearchPublic Health and Health Servicesen_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsLife Sciences & Biomedicineen_US
dc.titleCentral And Systemic Haematological Responses Are Similar Between Continuous And Intermittent Blood Flow Restricted Resistance Exerciseen_US
dc.typeConference outputen_US
dc.type.descriptionE3 - Conferences (Extract Paper)en_US
dcterms.bibliographicCitationRoberts, LA; Davids, C; Coombes, J; Peake, J; Raastad, T, Central And Systemic Haematological Responses Are Similar Between Continuous And Intermittent Blood Flow Restricted Resistance Exercise, Medicine & Science in Sports & Exercise, 2020, 52 (7S), pp. 843-843en_US
gro.hasfulltextNo Full Text
gro.griffith.authorRoberts, Llion A.

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