Abstract：
PURPOSE:The aim of this study was to estimate the effect of altitude (1500m vs. 3200m) on balance strategies, and to determine the influence of age (> or <40 years) and expertise (> or <20days of mountain climbing/year) on postural stability at altitude. METHOD:Eighty-nine volunteer mountaineers were tested at 1500m, 3200m immediately after exiting the cable car and at 3200m following the climb and return. Double-leg stance with eyes closed and single-leg stance with eyes open were tested. The center of pressure (CoP) was recorded for 12.8s using a stabilometric force platform. Length, surface, ratio (length/surface), and average speed of the CoP, as well as lower limb loading were calculated. Groups and altitudes were compared using ANOVA. Significance was set to p<0.05. RESULTS:CoP ratio was significantly higher during both balance conditions at 3200m compared to 1500m (p<0.05). Lower limb loading was symmetrical at 1500m but not at 3200m (p<0.05). There was no influence of age or expertise at 1500m (p=NS), however at 3200m, older subjects and subjects with less expertise had greater length and surface of the CoP, showing more instability (p<0.05). CONCLUSION:Postural stability was immediately reduced on arrival at 3200m, particularly in subjects above the age of 40 years with less expertise.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Bruyneel AV,Humbert A,Bertrand Mdoi
10.1016/j.neulet.2017.06.010subject
Has Abstractpub_date
2017-09-14 00:00:00pages
16-21eissn
0304-3940issn
1872-7972pii
S0304-3940(17)30490-1journal_volume
657pub_type
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