File(s) not publicly available
Acute physiological responses to low-intensity blood flow restriction cycling
journal contribution
posted on 2023-04-28, 06:42 authored by Hannah Thomas, BR Scott, JJ PeifferOBJECTIVES: Blood flow restriction (BFR) during interval cycling may stimulate aerobic and anaerobic adaptations. However, acute physiological responses to BFR interval cycling have not been extensively investigated. DESIGN: Eighteen males completed low-intensity (LI), low-intensity with BFR (LIBFR) and high-intensity (HI) interval cycling sessions in randomised and counterbalanced order. These included a standardised warm-up and three two-min intervals interspersed with two-min recovery. Interval intensity during HI, LI and LIBFR were 85%, 40% and 40% of peak power output obtained during graded exercise tests. METHODS: During LIBFR, 80% arterial occlusion was applied to both legs during the interval efforts and removed during recovery. Continuous measures of heart rate (HR), cardiac output (CO) and oxygen consumption (V˙O2) were recorded. Blood pressure (BP) and rating of perceived exertion (RPE) were measured following intervals. Blood lactate concentration was measured pre- and post-exercise. RESULTS: BP, HR, CO, V˙O2, lactate and RPE were greatest during HI. During the active intervals, BP, HR and CO were greater during LIBFR than LI. V˙O2 during recovery periods were greater in LIBFR than LI. Post-session lactate was greater during LIBFR than LI. Importantly, mean arterial pressure during interval three was significantly greater in LIBFR (124±2mmHg) than HI (114±3mmHg). CONCLUSIONS: LIBFR increases cardiovascular and metabolic stress compared with LI and could provide an alternative aerobic training method for individuals unable to perform high-intensity exercise. However, increases in mean arterial pressure during LIBFR indicates high myocardial workload, and practitioners should therefore use caution if prescribing LIBFR for vascular compromised individuals.
History
Journal
Journal of Science and Medicine in SportVolume
21Pagination
969-974Location
AustraliaPublisher DOI
ISSN
1440-2440eISSN
1878-1861Language
enPublication classification
C1.1 Refereed article in a scholarly journalIssue
9Publisher
Elsevier BVUsage metrics
Categories
Keywords
Aerobic capacityAerobic exerciseAnaerobic capacityBlood pressureCardiac outputIntermittent exerciseAdultBlood PressureCardiac OutputExerciseExercise TestHeart RateHigh-Intensity Interval TrainingHumansLactic AcidLower ExtremityMaleOxygen ConsumptionRNA-Binding ProteinsRegional Blood FlowTourniquetsYoung AdultCardiovascularHuman Movement and Sports Science not elsewhere classifiedPublic Health and Health Services not elsewhere classifiedMedical Physiology not elsewhere classified
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC