Actiwatch general descriptions:

Our scientifically-valid Actiwatch systems are designed to provide accurate and objective activity, sleep, wake, and light exposure data. Designed to be comfortable, rugged, and water resistant , they fit seamlessly into your user’s lifestyle.

Professional sleep and activity monitoring solutions Actiwatch monitoring systems.

Valid and accurate data collection couldn’t be easier.

Our scientifically-valid Actiwatch systems are designed to provide accurate and objective activity, sleep, wake, and light-exposure data. Due to the many advantages of Actiwatch technology, thousands of people around the world have worn our devices day in and day out in a multitude of sleep labs, research programs, and clinical trials.

The Actiwatch advantage:
Compact, reliable devices that are easy to implement

•  Small size, comfortable, and waterproof.
•  Easy to wear for days, weeks, and even months.
•  Data is recorded 24/7 to help you obtain real-world insights into subjects’ sleep/wake patterns.
•  Collect up to nine different parameters (depending on model).
•  Gather important outcome measures for pharma, academic research, and clinical applications.
•  Record valuable sleep and activity endpoints for studies in areas such as pain, fatigue and depression.
•  Scientifically-valid technology from a leader in sleep.
•  Validated against PSG gold standard for sleep measures.
•  Used in hundreds of studies in a variety of environments.
•  Used on infants through the elderly.

Each Actiwatch model provides different feature combinations so you can select the one that best fits your specific needs. All are comfortable, rugged, and waterproof to fit seamlessly with different lifestyles.

Actiwatch validation paper:


Kushida, Clete A.,Arthur Chang, Chirag Gadkary, Christian Guilleminault,Oscar Carrillo,William C.Dement. Comparison of actigraphic, polysomnographic, and subjective assessment of sleep parameters in sleep disordered patients. Sleep Medicine, 2001; Vol.2; pp. 389-396.

Lichstein, K.L., Stone, K.C.,Donaldson, J.,Nau, S.D., Soeffing, J.P.,Murray, D. Lester, Aguillard,N. Actigraphy. Validation with Insomnia. SLEEP, 2006; Vol. 29;No. 2; pp. 232-239.

Edinger, J.D.,Means,M.K., Stechuchak, K.M.,Olsen,M.K. A pilot study of inexpensive sleep-assessment devices.Behavioral Sleep Medicine, 2004; Vol. 2;No. 1; pp. 41-49.

Activity end-points for studies in pain:

Smith MT, Haythornthwaite JA. How do sleep disturbance and chronic pain inter-relate? Insights from the longitudinal and cognitive-behavioral clinical trials literature. Sleep Medicine Reviews 8: 119-132, 2004.

Ellingson LD, Shields MR, Stegner AJ, Cook DB. Physical activity, sustained sedentary behavior, and pain modulation on women with fibromyalgia. J of Pain 13: 195-206, 2012.

Haack M, Scott-Sutherland J, Santangelo G, Simpson NS, Sethna N, Mullington JM. Pain sensitivity and modulation in primary insomnia. Eur. J. Pain 16: 522-533, 2012.

Heneweer H, Vanhees L, Picavet SJ. Physical activity and low back pain: a U-shaped relations? Pain 143: 21-25, 2009.

Activity end-points for studies in fatigue:

Zautra AJ, Fasman R, Parish BP, Davis MC. Daily fatigue in women with osteoarthritis, rheumatoid arthritis, and fibromyal- gia. Pain 2007, 128:128-137.

Murphy, SL, Smith DM. Ecological measurement of fatigue and fatigability in older adults with osteoarthritis. J. Gerontol A Bio Sci Med Sci 2010, 65A, 184-189.

Activity end-points for studies in depression:

Nicassio PM, Ormseth SR, Kay M, Custodio M, Irwin MR, Olmstead R, Weisman MH. The contribution of pain and de- pression to self-reported sleep disturbance in patients with rheumatoid arthritis. Pain 2012, 153:107-112.


Why is actigraphy an efficient method for collecting sleep data?

Polysomnography (PSG) is the gold standard technology for assessing sleep. It is objective, but it is also expensive and limited to just a few nights of data collection which can impede its ability to document sleep problems that don't occur every night. Polysomnography testing process can also interfere with sleep, especially on the first night.

Patient-reported sleep questionnaires are low cost, can be used for multiple nights, and likely do not interfere with sleep. However, they are imprecise and subjective.

Unlike questionnaires, where the endpoints are limited to specific questions asked, actigraphy data can be analyzed in many ways including estimation of PSG endpoints such as:

•  total sleep time.
•  wake after sleep onset.
•  sleep efficiency.

More direct endpoints such as movement during the night and circadian rhytms can also be evaluated.

Actigraphy is the only objective assessment of daytime activity that can be used throughout the day, regardless of a subject's activities. Patient's responses to questionnaires are subjective and imprecise. Subjects often have a strong tendency to overstate thru activity intensities. As with sleep data, daytime activity data can be analyzed in many ways to not only detect activity means and peaks, but to detect time spent at different activity levels, daily activity patterns and circadian rhythms.

Wrist-worn actigraphy devices provide minute-by-minute records of motion, day and night for weeks at a time. They are low cost, non-invasive, require no patient input, and are well tolerated by patients and research subjects so they can be used practically for many nights. Although they have been validated against PSG in many studies and recommended for use in sleep clinics, they measure only the physical manifestations of sleep. The relationships between those manifestations and the PSG-measured aspects of sleep can vary among disease conditions and treatments.

Daytime Activity:  Activity is typically measured by either activity questionnaires or actigraphy devices worn on the wrist or hip. Self-reported levels of activity suffer from the need to have the participant complete the questionnaire each day, the lack of objective quantification, and a tendency for people to overestimate their activity level during the day. An actigraphy device worn on the wrist or hip provides an objective assessment of activity that has been well described and validated, but the subject must wear it almost all of the time. Fortunately, subject adherence to protocols requiring that they wear actigraphy devices is generally over 90-95%- especially for wrist-worn devices.

See examples of Actigraphy cases

Actigraphy Case


Below are links to hear and read how sleep clinicians implemented actigraphy in order to help assess a variety of sleep complaints among various patients.

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Actiwatch Models
and Specifications


Actiwatch 2
Actiwatch Spectrum Plus
Actiwatch Spectrum Pro

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Actiware software features


Actiware software is a flexible and powerful software package that allows users to easily configure and retrieve recorded data from all Actiwatch models.

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Ordering Information

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Actiwatch Bibliography

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Actiwatch manuals

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