Non-invasive motor unit analysis reveals specific responses during maximal muscle contraction under normobaric hypoxia.

ABSTRACT: Hypoxia has been extensively studied as a stressor which pushes human bodily systems to responses and adaptations. Nevertheless, a few evidence exist onto constituent trains of motor unit action potential, despite recent advancements which allow to decompose surface electromyographic signals. This study aimed to investigate motor unit properties from noninvasive approaches during maximal isometric exercise in normobaric hypoxia. Applying a cross-over design, 18 participants (gender-matched, on average age 22.6 y, BMI 23.6 kg/m², and bioimpedance phase angle 6.4) were exposed twice to hypoxia (FiO₂ ≊ 15.0% and FiO₂ ≊ 13.4%, separately, by using a tent connected with a hypoxic generator) and once to normobaric normoxia. After ≊ 30 min inside the tent, partici

SUBMITTER: Bondi D 

PROVIDER: S-EPMC12488839 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature