Study Of Human Locomotor Activity Using Actiwatch


Human locomotor exercise could possibly be recorded utilizing the Actiwatch, which is operative by Actiwre host software program. The Actiwatch machine makes use of an accelerometer to detect and log wrist motion. This technique is called actigraphy and has been proven to be a helpful means for discriminating sleep from wake exercise. An goal recording is completed throughout the affected person’s regular residing atmosphere for a number of, consecutive 24-hour durations. The small measurement (just like a wrist-watch) and rugged nature of the Actiwatch enable it to be comfortably worn throughout actions of day by day residing, together with bathing, swimming and even vigorous motion.

Once exercise information are retrieved utilizing the Actiware host software program and communication dock, they’re displayed as an actogram which is an insightful graphical show of sleep/wake patterns. This show permits for fast and straightforward interpretation and affirmation of sleep schedule and is a useful gizmo to assist sleep professionals precisely educate sufferers about their sleep patterns. It additionally helps to establish the steps to attain sleep enchancment or advantages achieved. For in-depth evaluation, particular person sleep durations might be chosen for interpretation through software program algorithms to quantify sleep statistics.

The Actiwatch machine can contribute to the evaluation, remedy and follow-up of sufferers with quite a lot of sleep complaints. The American Academy of Sleep Medicine (AASM) has made varied suggestions in its apply parameters for actigraphy within the examine of sleep and circadian rhythms (Ancoli et al, 2003). These apply parameters are a information to the suitable use of actigraphy, each as a diagnostic device for the analysis of sleep problems and as an consequence measure of remedy efficacy in scientific settings with acceptable sleep populations. Actigraphy can contribute to the analysis of insomnia evaluation. Actigraphy is helpful as an adjunct to routine scientific analysis for analysis of circadian rhythm problems and extreme sleepiness.

The usefulness of Actiwatch is maximized when demonstration of a multi-day rest-activity sample is important, goal details about rest-activity patterns is required or severity of sleep disturbances reported by the topic or caretaker is inconsistent with scientific impressions or laboratory findings. It can be useful when clarification is required of results or compliance with pharmacologic, behavioral, phototherapeutic or chronotherapeutic remedy and even for assortment of historical past can’t be obtained and polysomnographic examine just isn’t indicated or won’t be of profit. Actigraphy offers an alternate for daytime sleepiness data when it’s not sensible to manage the a number of sleep latency assessments (Sadeh et al, 1995).

Actigraphy could also be used successfully within the particular populations like aged, newborns, sufferers with hypertension, melancholy and schizophrenia. Actigraphy can also be helpful in figuring out rest-activity patterns throughout transportable sleep apnea testing.


The examine was performed on 20 topics, attending a workshop, of varied age teams starting from 20-60 years. The system was put in on the topics and the settings of gadgets had been performed on to the topics by strapping them on wrists. The work had been performed by the assistance of pc specialists, who put in the watches to the pc utilizing Actiware software program. The topics had been instructed learn how to deal with it and put on the machine correctly. A log ebook was maintained to register every Actiwatch machine, which consist all of the required data of the topics like, title, age, intercourse, medicine, particular physiological situations and to document any important developments or notes concerning the topic’s expertise.

The Actiwatch gadgets had been worn for 7 days to be able to acquire a consultant pattern of sleep/wake behaviors. The topics had been instructed to take care of roughly comparable routine. As the entire topics had been attending the identical workshop, they had been sure to take care of comparable routine, which embrace:

Breakfast: 08:00 – 09:00

Session I: 10:00 – 13:00

Tea break: 11:30 – 11:45

Lunch: 13:00 – 14:00

Session II: 15:00 – 18:00

Tea break: 16:30 – 16:45

Presentation: 18:30 – 19:30

Dinner: 20:30 – 21:30

The topic particulars had been uploaded within the pc and sampling data was set to the Actiwatch system. The Actiware software program and Actiwatch was put in as per the Software Install Guides, the Actiware Software Manual. After 7 days, the Actiwatch gadgets together with the log ebook had been returned for information processing.

After getting again, the info had been retrieved from Actiwatches. This course of positioned the saved exercise data from the Actiwatch into the affected person database in pc throughout the Actiware Sleep Analysis Software for interpretation and evaluation. The activity was carried out in response to the Technician’s and Software Install Guides, the Actiware Software guide.

For each topic, the bedtime and rise time was set for every main sleep interval (Rest Interval). Those information had been entered from the occasion marker of the topic and sleep log. The time was additionally cross checked with the exercise sample. After preliminary configuration of the software program program, a report was generated mechanically and printed.


The relaxation exercise patterns and calculated sleep statistics had been reviewed with the topics to grasp their sleep patterns and their locomotor actions. The locomotor actions of 20 topics for 7 days had been recorded and the actigraphy was performed, which revealed a roughly comparable sample of exercise, which could have resulted as a result of similarity of their day by day routine. The sleep wake sample in 20 topics had been noticed and analyzed contemplating their comparable routine and was discovered that the utmost common relaxation interval (RI) was 514.3 of topic 6 and minimal 380.7 of topic 19. The common relaxation interval of 20 topics for 7 days was 457.6.


Actigraphy has been used to review sleep/wake patterns for over 20 years. The benefit of actigraphy over conventional polysomnography (PSG) is that actigraphy can conveniently document repeatedly for 24-hours a day for days, weeks and even longer. The wrist actigraphy can usefully approximate sleep versus wake state throughout 24 hours and have famous that actigraphy has been used for monitoring insomnia, circadian sleep/wake disturbances, and periodic limb motion dysfunction. Actigraphs are gadgets typically positioned on the wrist, though they can be positioned on the ankle or trunk, to document motion. Collected information are downloaded to a pc for show and evaluation of exercise/ inactivity that in flip might be additional analyzed to estimate wake/sleep. The latter know-how is predicated on the remark that there’s much less motion throughout sleep and extra motion throughout wake (Sadeh et al, 1995).

Actigraphs immediately have motion detectors (e.g., accelerometers) and enough reminiscence to document for as much as a number of weeks. Movement is sampled a number of occasions per second and saved for later evaluation. Computer applications are used to derive ranges of exercise/inactivity, rhythm parameters, comparable to amplitude or acrophase, and sleep/wake parameters comparable to whole sleep time, % of time spent asleep, whole wake time, % of time spent awake and variety of awakenings (Ancoli et al, 2003).

Actigraphy is more and more being utilized in scientific analysis involving people of varied ages, who’re of regular well being or with quite a lot of well being situations, and in a lot of totally different settings. In nearly all of these research, actigraphy was used to measure sleep and exercise rhythms which may not in any other case be obtainable utilizing conventional (e.g., PSG) methods. In a rising variety of sleep intervention trials, actigraphy carried out for a number of days and nights of testing was reported to point out proof of helpful remedy results. Actigraphy has additionally been utilized in research involving in any other case wholesome adults to display sedating results of varied drugs and to point out variations in sleep in periods of sleep deprivation, for instance, amongst navy plane personnel on lengthy flights. In addition, a number of massive research have used actigraphy in community-based samples to display variations between people based mostly on age, gender, ethnicity, depressed temper, and different traits.

In the current examine, the human locomotor exercise of 20 topics had been recorded and analysed, utilizing Wrist Actiwatch aided with Actiware Host Software. The topics had been having no important sleep problem and had proven common sleep wake sample and relaxation interval. The day by day routine for all the topics had been comparable as they had been attending a workshop and had been bounded to observe the schedule determined by the workshop.

The actigraphy could possibly be a useful gizmo in understanding the sleep sample of sufferers having varied sleep problems. By analyzing the actigram, the effectivity of the remedy of a selected sleep problem could possibly be outlined throughout remedy. Objective suggestions to sufferers is usually a really beneficial device to enhance sleep. The actogram is a illustration of regular sleep/wake patterns. The sleep durations usually seem at an identical level within the day and are of comparable size. By displaying sufferers a change to a sample just like this one, it’s doable to bolster behaviors which can be conducive to good sleep.


The writer want to thank the Second SERC School of Chronobiology and the convener Prof. A.Ok. Pati, beneath steerage of whom the work had been performed. The writer would additionally grateful to her colleagues, who assist her to make the challenge profitable.


1. Ancoli-Israel S, Cole R, Allessi C, et. al. The Role of Actigraphy within the Study of Sleep and Circadian Rhythms. Sleep 2003; 26(3): 342-92.

2. Sadeh A, Hauri PJ, Kripke DF, Lavie P. The Role of Actigraphy within the Evaluation of Sleep Disorders. Sleep 1995; 18(4):288-302.

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