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dc.contributor.authorKass, Lindsy S.
dc.contributor.authorPoeira, Filipe
dc.date.accessioned2016-03-31T13:22:42Z
dc.date.available2016-03-31T13:22:42Z
dc.date.issued2015-04-24
dc.identifier.citationKass , L S & Poeira , F 2015 , ' The effect of acute vs chronic magnesium supplementation on exercise and recovery on resistance exercise, blood pressure and total peripheral resistance on normotensive adults ' , Journal of the International Society of Sports Nutrition , vol. 12 , no. 1 , 19 . https://doi.org/10.1186/s12970-015-0081-z
dc.identifier.urihttp://hdl.handle.net/2299/16867
dc.description© 2015 Kass and Poeira; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
dc.description.abstractBackground: Magnesium supplementation has previously shown reductions in blood pressure of up to 12 mmHg. A positive relationship between magnesium supplementation and performance gains in resistance exercise has also been seen. However, no previous studies have investigated loading strategies to optimise response. The aim of this study was to assess the effect of oral magnesium supplementation on resistance exercise and vascular response after intense exercise for an acute and chronic loading strategy on a 2-day repeat protocol. Methods: The study was a randomised, double-blind, cross-over design, placebo controlled 2 day repeat measure protocol (n = 13). Intense exercise (40 km time trial) was followed by bench press at 80% 1RM to exhaustion, with blood pressure and total peripheral resistance (TPR) recorded. 300 mg/d elemental magnesium was supplemented for either a 1 (A) or 4 (Chr) week loading strategy. Food diaries were recorded. Results: Dietary magnesium intake was above the Reference Nutrient Intake (RNI) for all groups. Bench press showed a significant increase of 17.7% (p = 0.031) for A on day 1. On day 2 A showed no decrease in performance whilst Chr showed a 32.1% decrease. On day 2 post-exercise systolic blood pressure (SBP) was significantly lower in both A (p = 0.0.47) and Chr (p = 0.016) groups. Diastolic blood pressure (DBP) showed significant decreases on day 2 solely for A (p = 0.047) with no changes in the Chr. TPR reduced for A on days 1 and 2 (p = 0.031) with Chr showing an increase on day 1 (p = 0.008) and no change on day 2. Conclusion: There was no cumulative effect of Chr supplementation compared to A. A group showed improvement for bench press concurring with previous research which was not seen in Chr. On day 2 A showed a small non-significant increase but not a decrement as expected with Chr showing a decrease. DBP showed reductions in both Chr and A loading, agreeing with previous literature. This is suggestive of a different mechanism for BP reduction than for muscular strength. TPR showed greater reductions with A than Chr, which would not be expected as both interventions had reductions in BP, which is associated with TPR.en
dc.format.extent8
dc.format.extent640918
dc.language.isoeng
dc.relation.ispartofJournal of the International Society of Sports Nutrition
dc.subjectAcute and chronic loading
dc.subjectBench press
dc.subjectBlood pressure
dc.subjectMagnesium supplementation
dc.subjectNutrition and Dietetics
dc.subjectFood Science
dc.titleThe effect of acute vs chronic magnesium supplementation on exercise and recovery on resistance exercise, blood pressure and total peripheral resistance on normotensive adultsen
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionAgriculture, Food and Veterinary Sciences
dc.contributor.institutionFood Policy, Nutrition and Diet
dc.contributor.institutionCentre for Research in Psychology and Sport Sciences
dc.contributor.institutionHigh Performance Sport Research Group
dc.contributor.institutionCentre for Agriculture, Food and Environmental Management Research
dc.contributor.institutionDepartment of Psychology, Sport and Geography
dc.contributor.institutionExercise, Health and Wellbeing Research Group
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1186/s12970-015-0081-z
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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