21 Days of Mammalian omega-3 Fatty Acid Supplementation Improves Aspects of Neuromuscular Function and Performance in Male Athletes Compared to Olive Oil Placebo

J Int Soc Sports Nutr. 2015 Jun 18;12:28. doi: 10.1186/s12970-015-0089-4. eCollection 2015.

Abstract

Background: Omega-3 polyunsaturated fatty acids (N-3) are essential nutrients for human health and integral components of neural tissues. There is evidence that N-3 supplementation may benefit exercise performance, however, no study has investigated the ergogenic potential of N-3 supplementation. Our objective was to determine the effect of short-term N-3 supplementation on neuromuscular-function and physical-performance in well-trained athletes.

Methods: Male athletes (n = 30), 25 years (SD 4.6), training 17 h(.)wk(-1) (SD 5) completed this randomized, placebo-controlled, parallel-design study. At baseline a blood sample was collected, maximal voluntary isometric contractions (MVC) with electromyography (EMG) recordings were measured, and participants underwent various performance tests including a Wingate test and 250 kJ time trial (TT) followed by repeated MVC and EMG measurement. Participants were then randomly assigned to receive N-3 (5 ml seal oil, 375 mg EPA, 230 mg DPA, 510 mg DHA) or placebo (5 ml olive oil) for 21-days after which baseline testing was repeated. The magnitude-based inference approach was used to estimate the probability that N-3 had a beneficial effect on neuromuscular-function and performance of at least ±1%. Data are shown as mean ± 90% confidence-interval.

Results: Plasma EPA was higher on N-3 than placebo (p = 0.004) but the increases in DPA and DHA were not significant (p = 0.087, p = 0.058). N-3 supplementation had an unclear effect on MVC force (4.1 ± 6.6%) but increased vastus lateralis EMG by 20 ± 18% vs placebo (very likely beneficial). N-3 supplementation reduced Wingate percent power drop by 4.76 ± 3.4 % vs placebo (very likely beneficial), but the difference in TT performance was unclear (-1.9 ± 4.8%).

Conclusion: Our data indicates N-3 PUFA supplementation improved peripheral neuromuscular function and aspects of fatigue with an unclear effect on central neuromuscular function. Clinical trial registration NCT0201433.

Keywords: Adaptations to training; Fat supplementation; Neuromuscular function; Omega-3 fatty acids; Performance.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipose Tissue
  • Adult
  • Athletes
  • Body Mass Index
  • Body Weight
  • Dietary Supplements*
  • Docosahexaenoic Acids / administration & dosage*
  • Eicosapentaenoic Acid / administration & dosage*
  • Electromyography
  • Humans
  • Male
  • Neuromuscular Junction / drug effects*
  • Neuromuscular Junction / metabolism
  • Olive Oil / administration & dosage*
  • Young Adult

Substances

  • Olive Oil
  • Docosahexaenoic Acids
  • Eicosapentaenoic Acid