Power law temporal auto-correlations in day-long records of human physical activity and their alteration with disease

L. A. Nunes Amaral, D. J. Bezerra Soares, L. R. Da Silva, L. S. Lucena, M. Saito, H. Kumano, N. Aoyagi, Y. Yamamoto

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Abstract

We investigate long-duration time series of human physical activity under three different conditions: healthy individuals in i) a constant routine protocol and ii) in regular daily routine, and iii) individuals diagnosed with multiple chemical sensitivities. We find that in all cases human physical activity displays power law decaying temporal auto-correlations. Moreover, we find that under regular daily routine, time correlations of physical activity are significantly different during diurnal and nocturnal periods but that no difference exists under constant routine conditions. Finally, we find significantly different auto-correlations for diurnal records of patients with multiple chemical sensitivities.

Original languageEnglish
Pages (from-to)448-454
Number of pages7
JournalEurophysics Letters
Volume66
Issue number3
DOIs
Publication statusPublished - 2004 May 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nunes Amaral, L. A., Bezerra Soares, D. J., Da Silva, L. R., Lucena, L. S., Saito, M., Kumano, H., Aoyagi, N., & Yamamoto, Y. (2004). Power law temporal auto-correlations in day-long records of human physical activity and their alteration with disease. Europhysics Letters, 66(3), 448-454. https://doi.org/10.1209/epl/i2003-10227-7