One week of magnesium supplementation lowers IL-6, muscle soreness and increases post-exercise blood glucose in response to downhill running

Charles Steward, Yue Zhou, Gary Keane, Matthew David Cook, Yunyi Liu, Tom Cullen

Research output: Contribution to journalArticle

Abstract

PURPOSE: Magnesium supplementation modulates glucose metabolism and inflammation, which could influence exercise performance and recovery. This study investigated the effect of magnesium intake on physiological responses and performance during eccentric exercise and recovery.

METHODS: Nine male recreational runners completed a counterbalanced, double-blind, placebo-controlled, cross-over study, registered at ClinicalTrial.gov. Participants consumed low magnesium diets and were supplemented with 500 mg/day of magnesium (SUP) or placebo (CON) for 7 days prior to a 10 km downhill (- 10%) running time trial (TT), separated by a 2-week washout period. At baseline and 24 h post-TT, maximal muscle force was measured. Interleukin-6 (IL-6), soluble interleukin-6 receptor (sIL-6R) and creatine kinase (CK) were measured at rest, 0 h, 1 h and 24 h post-TT. Muscle soreness was measured at the previous times plus 48 h and 72 h post. Glucose and lactate were measured during the TT. 

RESULTS: The main effect of condition was detected for IL-6 (SUP: 1.36 ± 0.66 vs CON: 2.06 ± 1.14 pg/ml) (P < 0.05, η2 = 0.54), sIL-6R (SUP: 27,615 ± 8446 vs CON: 24,368 ± 7806 pg/ml) (P < 0.05, η2 = 0.41) and muscle soreness (P < 0.01, η2 = 0.67). Recovery of blood glucose and muscle soreness were enhanced in SUP post-TT. There were no differences in glucose and lactate during the TT, or post measures of CK and maximal muscle force. CONCLUSION: Magnesium supplementation reduced the IL-6 response, enhanced recovery of blood glucose, and muscle soreness after strenuous exercise, but did not improve performance or functional measures of recovery.

Original languageEnglish
Pages (from-to)2617-2627
Number of pages11
JournalEuropean Journal of Applied Physiology
Volume119
Issue number11-12
Early online date17 Oct 2019
DOIs
Publication statusPublished - Dec 2019

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Bibliographical note

The final publication is available at Springer via http://dx.doi.org/10.1007/s00421-019-04238-y

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Keywords

  • Exercise
  • Glucose
  • Interleukin-6
  • Magnesium
  • Muscle soreness
  • Recovery

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health
  • Physiology (medical)

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