Binge drinking has no effect on muscular strength and neuromuscular responses during maximal and high-intensity isometric fatigue protocol

• Rodrigo Rodrigues ^[1] ; Rodrigo de Azevedo Franke ^[2] ; Bruno C. Teixeira ^[3] ; Rodrigo C. O. Macedo ^[4] ; Fernando Diefenthaeler ^[5] ; Bruno Manfredini Baroni ^[2] ; Marco Aurélio Vaz ^[1]
  1. [1] Universidade Federal do Rio Grande do Sul

     Universidade Federal do Rio Grande do Sul

     Brasil

     
  2. [2] Federal University of Health Science of Porto Alegre,
  3. [3] State University of Minas Gerais
  4. [4] University of Santa Cruz do Sul
  5. [5] Federal University of Santa Catarina

  Mostrar afiliaciones +
• Localización: Revista andaluza de medicina del deporte, ISSN 1888-7546, Vol. 17, Nº. 1-2, 2024, págs. 83-88
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • We investigated the effects of binge drinking on maximal strength, time to exhaustion during a high-intensity isometric fatigue protocol, and neuromuscular responses of the elbow flexor muscles. Ten young male participants were randomized in two conditions: (1) alcohol consumption (ALC) or (2) placebo consumption (PLA). In each condition, volunteers ingested 1g of alcohol per kg of body mass of alcoholic beer (ALC) or non-alcoholic beer (PLA). Neuromuscular performance (elbow flexors peak torque and time to exhaustion – TTE - during an isometric fatigue protocol at 70% of peak torque) and EMG parameters (amplitude and median frequency) of biceps brachii (BB) and brachioradialis (BRA) were assessed before and after drink ingestion. A breath alcohol concentration of 1.1 ± 0.25 mg/L was observed in ALC condition. Torque was similar between-conditions (p = 0.76) and condition*moment interaction (p = 0.92), with a significant reduction in post in both conditions (p = 0.01; ALC: -4.4%; PLA: -4.7%). TTE and maximal EMG amplitude of BB were not affected by conditions and moments (p > 0.05). Maximal EMG amplitude of BRA was reduced in post in both conditions (ALC: -16.4%; PLA: -14.6%). EMG amplitude of BB and BRA during the fatigue protocol, the behavior was similar between moments and conditions (p > 0.05) and we only observed an increase during protocol (p < 0.05). Median frequency of BB was higher in PLA compared to ALC (+9.8%). Decreases were observed in both muscles during protocol (p < 0.001). Our results revealed that binge drinking did not alter maximal strength, time to exhaustion during high-intensity isometric fatigue protocol, and neuromuscular responses.