SF68 Analisis Inferensial Respons Fisiologis Pendaki terhadap Perubahan Ketinggian dan Tekanan Atmosfer
Keywords:
tekanan atmosfer; SpO₂; denyut jantung; ΔHR; statistik inferensialAbstract
Perubahan ketinggian dan tekanan atmosfer selama pendakian dapat memengaruhi saturasi oksigen perifer (SpO₂) dan denyut jantung (HR). Penelitian ini mengevaluasi respons tersebut secara inferensial melalui analisis SpO₂, HR, dan perubahan HR terhadap baseline masing-masing subjek (ΔHR). Empat pendaki diukur berulang pada ketinggian 214, 1165, dan 1480 mdpl menggunakan sensor MAX30102 untuk SpO₂ dan HR serta BMP280 untuk tekanan atmosfer. Statistik deskriptif, uji Friedman, Kendall's W, dan uji lanjut Wilcoxon signed-rank digunakan karena jumlah sampel kecil dan desain pengukuran berulang. Tekanan atmosfer menurun dari 1009,0 menjadi 850,1 dan 749,1 hPa. Rata-rata SpO₂ menurun dari 99,75 ± 0,50% menjadi 89,25 ± 2,22% dan 84,00 ± 0,82%, sedangkan rata-rata HR meningkat dari 87,00 ± 4,24 BPM menjadi 123,50 ± 5,07 BPM dan 132,50 ± 2,08 BPM. Rata-rata ΔHR mencapai +36,50 BPM pada 1165 mdpl dan +45,50 BPM pada 1480 mdpl. Uji Friedman menunjukkan perbedaan global yang signifikan untuk SpO₂, HR, dan ΔHR (χ²(2)=8,00; p=0,018; Kendall's W=1,00), sedangkan uji pasangan Wilcoxon belum signifikan (p=0,125; p terkoreksi Bonferroni=0,375). Temuan ini memperluas pendekatan klasifikasi fuzzy sebelumnya dengan menggunakan ΔHR sebagai parameter respons individual. Interpretasi hasil masih dibatasi oleh jumlah subjek yang kecil (n=4) dan ketinggian maksimum 1480 mdpl yang belum merepresentasikan paparan high-altitude.
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