Effects of three days magnesium supplementation on anaerobic exercise performance

Crowe, M., and Leicht, A. (2005) Effects of three days magnesium supplementation on anaerobic exercise performance. In: Promoting Innovation Measuring Success: program & abstracts of 2005 Australian Conference of Science and Medicine in Sport, Fifth National Physical Activity Conference and Fourth National Sports Injury Prevention Conference, p. 135. From: 2005 Australian Conference of Science and Medicine in Sport, 13-16 October 2005, Melbourne, VIC, Australia.

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Abstract

Magnesium is reportedly important in energy production and therefore may play a role in both anaerobic and aerobic performance. Therefore, this study investigated the effects of dietary magnesium supplementation on repeated, anaerobic cycling performance. Thirteen (8 male, 5 female) healthy, active volunteers provided written informed consent to participate in the study (mean and range age, height and mass of 21 yr, 17-40 yr; 177.0 cm, 161.0-190.2 cm; 71.7 kg, 51.3-96.2 kg). A randomised, double-blind, placebo-controlled procedure was employed whereby the participants were tested at the same time of day, 7 d apart following 3 d supplementation with a commercially-available magnesium supplement (122 mg/d magnesium) or the equivalent dose of a placebo. Testing involved a 5 min warm up followed by two 60 s maximal cycling efforts separated by 3 min rest. Peak power, time to reach peak power, total work, rating of perceived exertion (RPE) and maximal HR were assessed during each exercise bout. Blood lactate was assessed at rest, following bout 1 and at 3 and 5 min after bout 2. Peak power, time to peak power, work and maximal HR all significantly decreased and RPE significantly increased from bout 1 to bout 2. However, magnesium supplementation did not significantly alter any of the measured variables during either exercise bout when compared to the placebo. Resting, mid-exercise and peak post-exercise lactates were also not affected by magnesium supplementation compared to the placebo. In conclusion, 3 d dietary magnesium supplementation did not enhance anaerobic exercise performance or recovery between bouts.

Item ID: 15978
Item Type: Conference Item (Presentation)
Keywords: supplement, lactate
ISBN: 978-1-875334-10-0
Date Deposited: 23 Nov 2011 02:39
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110602 Exercise Physiology @ 50%
11 MEDICAL AND HEALTH SCIENCES > 1111 Nutrition and Dietetics > 111101 Clinical and Sports Nutrition @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970111 Expanding Knowledge in the Medical and Health Sciences @ 100%
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