Details

Autor(en) / Beteiligte

• Tonellato, Marshall H.
• Cates, Valerie C.
• Dickenson, Jessica A.
• Day, Trevor A.
• Strzalkowski, Nicholas D. J.

Titel

The effects of acute normobaric hypoxia on standing balance while dual-tasking with and without visual input

Ist Teil von

• European journal of applied physiology, 2024-08, Vol.124 (8), p.2511-2521

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2024

Quelle

Springer Nature - Complete Springer Journals

Beschreibungen/Notizen

• Purpose To investigate the influence of acute normobaric hypoxia on standing balance under single and dual-task conditions, both with and without visual input. Methods 20 participants (7 female, 20–31 years old) stood on a force plate for 16, 90-s trials across four balance conditions: single-task (quiet stance) or dual-task (auditory Stroop test), with eyes open or closed. Trials were divided into four oxygen conditions where the fraction of inspired oxygen (F I O 2 ) was manipulated (normoxia: 0.21 and normobaric hypoxia: 0.16, 0.145 and 0.13 F I O 2 ) to simulate altitudes of 1100, 3,400, 4300, and 5200 m. Participants breathed each F I O 2 for ~ 3 min before testing, which lasted an additional 7–8 min per oxygen condition. Cardiorespiratory measures included heart rate, peripheral blood oxygen saturation, and pressure of end tidal ( P ET ) CO 2 and O 2 . Center of pressure measures included total path length, 95% ellipse area, and anteroposterior and mediolateral velocity. Auditory Stroop test performance was measured as response accuracy and latency. Results Significant decreases in oxygen saturation and P ET O 2 , and increased heart rate were observed between normoxia and normobaric hypoxia ( P  < 0.0001). Total path length was higher at 0.13 compared to 0.21 F I O 2 for the eyes closed no Stoop test condition ( P  = 0.0197). No other significant differences were observed. Conclusion These findings suggest that acute normobaric hypoxia has a minimal impact on standing balance and does not influence auditory Stroop test or dual-task performance. Further investigation with longer exposure is required to understand the impact and time course of normobaric hypoxia on standing balance.