Hemodynamics and cerebral oxygenation during acute exercise in moderate normobaric hypoxia and with concurrent cognitive task in young healthy males.
| Autor: | Doneddu, Azzurra, Roberto, Silvana, Guicciardi, Marco, Pazzona, Riccardo, Manca, Andrea, Monni, Alessandra, Fanni, Massimo, Leban, Bruno, Ghiani, Giovanna, Spranger, Marty D., Mulliri, Gabriele, Crisafulli, Antonio |
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| Předmět: |
OXYGEN saturation
TASK performance RESEARCH funding BRAIN EXERCISE therapy MENTAL illness HEMODYNAMICS EXERCISE intensity DESCRIPTIVE statistics REACTIVE oxygen species OXYGEN in the body CARDIOPULMONARY system CARDIOGRAPHY HEART beat CARDIAC output CEREBRAL circulation CEREBRAL anoxia EXERCISE tests REACTION time STROKE volume (Cardiac output) COGNITION EMPLOYEES' workload |
| Zdroj: | Applied Physiology, Nutrition & Metabolism; 2024, Vol. 49 Issue 11, p1573-1584, 12p |
| Abstrakt: | The present investigation aimed to study the cardiovascular responses and the cerebral oxygenation (Cox) during exercise in acute hypoxia and with contemporary mental stress. Fifteen physically active, healthy males (age 29.0 ± 5.9 years) completed a cardiopulmonary test on a cycle ergometer to determine the workload at their gas exchange threshold (GET). On a separate day, participants performed two randomly assigned exercise tests pedaling for 6 min at a workload corresponding to 80% of the GET: (1) during normoxia (NORMO), and (2) during acute, normobaric hypoxia at 13.5% inspired oxygen (HYPO). During the last 3 min of the exercise, they also performed a mental task (MT). Hemodynamics were assessed with impedance cardiography, and peripheral arterial oxygen saturation and Cox were continuously measured by near-infrared spectroscopy. The main results were that both in NORMO and HYPO conditions, the MT caused a significant increase in the heart rate and ventricular filling rate. Moreover, MT significantly reduced (74.8 ± 5.5 vs. 62.0 ± 5.2 A.U.) Cox, while the reaction time (RT) increased (813.3 ± 110.2 vs. 868.2 ± 118.1 ms) during the HYPO test without affecting the correctness of the answers. We conclude that in young, healthy males, adding an MT during mild intensity exercise in both normoxia and acute moderate (normobaric) hypoxia induces a similar hemodynamic response. However, MT and exercise in HYPO cause a decrease in Cox and an impairment in RT. [ABSTRACT FROM AUTHOR] |
| Databáze: | Complementary Index |
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