and periodogram for one of these outliers are illustrated in Fig.
Practical application of an actogram
to physical fitness research: recording of physical activity pattern during daily life.
The activity was recorded every hour for a total of 384 h and the data was analyzed by Actogram
representations of activity visibly show the shift in activity levels after the light cycle changes.
Inspection of the actogram
(not presented here) revealed a decrease in sleep disruptions for the first several nights of the valerian condition, after which however, no further improvement could be detected.
Under the LD 16:8 photoperiod in the autumn, the actogram
showed a high level of nocturnal activity (Fig.
These values were entered into the program ActogramJ to create actograms
that could be used to determine the types of rhythms expressed by individual horseshoe crabs (Schmid et al., 2011).
were drawn with Activity Pattern software (ver.
In addition, the entrainment by light stimuli seemed normal in the SDT fatty rats, as revealed by the observation that the SDT fatty rats exhibited the same SLA pattern over a period of 5 consecutive days of monitoring, although actograms
were not measured in the present study.
The bar below the actograms
indicates the light (white) and dark (black) periods, and the light and dark periods are indicated by white and gray backgrounds, respectively.
After this period of free running, actograms
for each animal were independently examined by two investigators to determine activity onset.
Wheel revolutions were recorded electronically and automatically saved to computer for later plotting (as actograms
) and periodogram analysis using the circadian analysis program 'Tau' (Schull, J., Mini-Mitter Co., Inc., Oregon, USA), utilising lines fitted to activity onsets for each phase of the experiments.