TY - JOUR
T1 - Power law temporal auto-correlations in day-long records of human physical activity and their alteration with disease
AU - Nunes Amaral, L. A.
AU - Bezerra Soares, D. J.
AU - Da Silva, L. R.
AU - Lucena, L. S.
AU - Saito, M.
AU - Kumano, H.
AU - Aoyagi, N.
AU - Yamamoto, Y.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - 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.
AB - 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.
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U2 - 10.1209/epl/i2003-10227-7
DO - 10.1209/epl/i2003-10227-7
M3 - Article
AN - SCOPUS:2442706344
VL - 66
SP - 448
EP - 454
JO - Lettere Al Nuovo Cimento
JF - Lettere Al Nuovo Cimento
SN - 0295-5075
IS - 3
ER -