The effects of magnesium supplementation on exercise performance
Newhouse IJ, Finstad EW
Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine · 29 citas
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Cómo se estudió
- Diseño
- Metaanálisis (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2000-07-01 · Clin J Sport Med · vol. 10 · número 3 · págs. 195–200
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 90 citas · más que el 65% de estudios similares · 0.3× el promedio de su campo
- Referencias
- 34 trabajos
- Acceso
- De pago
- Áreas de investigación
- Magnesium in Health and Disease · Exercise and Physiological Responses · Sports Performance and Training
- Palabras clave
- magnesium supplementation, exercise performance, athletes, hypomagnesemia, strength performance, anaerobic performance, aerobic performance, VO2max, magnesium status assessment, dietary magnesium, gender differences, multivitamin and mineral supplements, dose-response relationship, endurance athletes, strength athletes, crossover design, confounding variables, age effects
- MeSH
- humans, magnesium, exercise, cross-over studies, dietary supplements
2 autores
- Ian Newhouse🇨🇦 · autor de correspondenciaLakehead University
- E Finstad🇨🇦Lakehead University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Objectives
Magnesium (Mg) status, although difficult to assess, is suspected to be marginal in many individuals, especially athletes, and this has led to the common use of Mg supplements. The purpose of this article is to critique research that has addressed Mg supplementation in athletes.
Data sources
The primary database was Medline, which was searched for English articles from 1966 to June 1999 using the words "magnesium" and "supplementation."
Study selection
Only experimental studies dealing with human subjects, Mg supplementation, and exercise performance were critiqued (n = 12).
Data extraction
Quality of critiqued articles was based on 1) use of cross-over designs, 2) how and if Mg status was assessed, 3) whether treatment was solely Mg supplementation, 4) duration of supplementation, 5) subject number, and 6) degree of experimental control. Articles were classified into "no effect" and "positive effect," and also were examined in regard to the type of performance outcome (strength, anaerobic-lactacid, and aerobic).
Data synthesis
Mg is a cofactor to over 325 enzymatic reactions, and a deficiency of the mineral therefore has many physiological and exercise performance implications. Low dietary intakes, as found in many female athletes, coupled with increased urinary losses with exercise, may eventually lead to an Mg deficiency. Strength of evidence favors those studies finding no effect of Mg supplementation, regardless of whether the performance outcome was strength, anaerobic-lactacid, or aerobic. Analysis was confounded due to: 1) variable exercise modes, intensities, and durations, 2) variable training states and ages of subjects, 3) subject selection favoring males and gender differences has not been probed, 4) Mg dosage has ranged from 1 day to 3 months and from 116 mg/day to 500 mg/day, 5) multivitamins/minerals have been ingested with the Mg, 6) with one exception, Mg status was either not reported or reliant on total Mg (TMg), 7) lack of a cross-over design, 8) only one study made note of controlling exercise prior to exercise testing and blood assay, and 9) typical Mg intake measured was only measured in three of the studies.
Conclusions
Most evidence indicates no effect of Mg supplementation on performance (strength, anaerobic-lactacid, and aerobic). When only peak treadmill speed during a VO2 max test is examined, the strength of evidence is equivocal. Trained subjects appear to benefit less than untrained subjects, but this observation requires further study. Little research has focused on physically active females who may be at the highest risk for Mg deficiency. Research has been confounded by numerous factors.
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