Neuromuscular adaptations to sprint interval training and the effect of mammalian omega-3 fatty acid supplementation

作者：Lewis Evan J H^*; Stucky Frederic; Radonic Peter W; Metherel Adam H; Wolever Thomas M S; Wells Greg D

来源：European Journal of Applied Physiology, 2017, 117(3): 469-482.

DOI：10.1007/s00421-017-3539-7

• Sprint interval training
• Omega-3
• Neuromuscular
• Adaptations to training
• Nutrition supplementation

Sprint interval training (SIT) stimulates rapid metabolic adaptations within skeletal muscle but the nature of neuromuscular adaptions is unknown. Omega-3 polyunsaturated fatty acids (N-3 PUFA) are suggested to enhance neuromuscular adaptations to exercise.
We measured the neuromuscular adaptations to SIT (Study-1) and conducted a placebo-controlled randomized double blinded study to determine the effect of N-3 PUFA supplementation on neuromuscular adaptations to SIT (Study-2). In Study-1, seven active men (24.4 +/- 2.6 years, VO2 peak 43.8 +/- 8.7 ml kg min(-1)) completed 2-weeks of SIT with pre- and post-training 10 km cycling time trials (TT). In Study-2, 30 active men (24.5 +/- 4.2 years, VO2 peak 41.0 +/- 5.1 ml kg min(-1)) were randomly assigned to receive N-3 PUFA (2330 mg day(-1)) (n = 14) or olive oil (n = 16) during 2-weeks of SIT with pre- and post-training TTs. Four week post-training, a SIT session and TT were also performed. Change in neuromuscular function was assessed from resting twitches, quadriceps maximal voluntary contraction (MVC) force, and potentiated twitch force (Q (tw)).
Study-1 showed that SIT did not elicit significant neuromuscular adaptations. Study-2 showed that N-3 PUFA supplementation had no significant effect on neuromuscular adaptations. Training caused lower MVC force [mean +/- SD; N-3 PUFA -9 +/- 11%, placebo -9 +/- 13% (p < 0.05 time)] and Q (tw) peripheral fatigue [N-3 PUFA -10 +/- 19%, placebo -14 +/- 13% (p < 0.05 time)]. TT time was lower after training in all groups [Study-1 -10%, Study-2 N-3 PUFA -8%, placebo -12% (p < 0.05 time)].
Two weeks of SIT improved TT performance in the absence of measurable neuromuscular adaptations. N-3 PUFA supplementation had no significant effect on SIT training adaptations.

• 出版日期2017-3