Lemminger 2022 Antioxidants (Basel)
| Lemminger AK, Fiorenza M, Eibye K, Bangsbo J, Hostrup M (2022) High-intensity exercise training alters the effect of N-acetylcysteine on exercise-related muscle ionic shifts in men. https://doi.org/10.3390/antiox12010053 |
Β» Antioxidants (Basel) 12:53. PMID: 36670915 Open Access
Lemminger Anders K, Fiorenza Matteo, Eibye Kasper, Bangsbo Jens, Hostrup Morten (2022) Antioxidants (Basel)
Abstract: This study investigated whether high-intensity exercise training alters the effect of N-acetylcysteine (a precursor of antioxidant glutathione) on exercise-related muscle ionic shifts. We assigned 20 recreationally-active men to 6 weeks of high-intensity exercise training, comprising three weekly sessions of 4-10 Γ 20-s all-out bouts interspersed by 2 min recovery (SET, n = 10), or habitual lifestyle maintenance (n = 10). Before and after SET, we measured ionic shifts across the working muscle, using leg arteriovenous balance technique, during one-legged knee-extensor exercise to exhaustion with and without N-acetylcysteine infusion. Furthermore, we sampled vastus lateralis muscle biopsies for analyses of metabolites, mitochondrial respiratory function, and proteins regulating ion transport and antioxidant defense. SET lowered exercise-related H+, K+, lactate-, and Na+ shifts and enhanced exercise performance by β45%. While N-acetylcysteine did not affect exercise-related ionic shifts before SET, it lowered H+, HCO3-, and Na+ shifts after SET. SET enhanced muscle mitochondrial respiratory capacity and augmented the abundance of Na+/K+-ATPase subunits (Ξ±1 and Ξ²1), ATP-sensitive K+ channel subunit (Kir6.2), and monocarboxylate transporter-1, as well as superoxide dismutase-2 and glutathione peroxidase-1. Collectively, these findings demonstrate that high-intensity exercise training not only induces multiple adaptations that enhance the ability to counter exercise-related ionic shifts but also potentiates the effect of N-acetylcysteine on ionic shifts during exercise. β’ Keywords: NAC, ROS, Antioxidant, High-intensity training, Lactate, Oxygen species, pH, Performance, Potassium, Scavengers β’ Bioblast editor: Plangger M
Labels: MiParea: Respiration, Exercise physiology;nutrition;life style
Organism: Human
Tissue;cell: Skeletal muscle
Preparation: Permeabilized tissue
Coupling state: LEAK, OXPHOS, ET
Pathway: F, N, S, NS, ROX
HRR: Oxygraph-2k
2023-01
