{"id":18,"date":"2021-02-26T15:28:26","date_gmt":"2021-02-26T18:28:26","guid":{"rendered":"https:\/\/condor.fabbricaweb.com.br\/blog\/?p=18"},"modified":"2026-08-24T12:11:18","modified_gmt":"2026-08-24T15:11:18","slug":"o-que-actigrafia","status":"publish","type":"post","link":"https:\/\/condor.fabbricaweb.com.br\/en\/o-que-actigrafia\/","title":{"rendered":"What is actigraphy?"},"content":{"rendered":"\n<figure class=\"wp-block-image alignright size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1.png\" alt=\"act\u00edgrafo\" class=\"wp-image-34156\" width=\"305\" height=\"381\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1.png 819w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1-240x300.png 240w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1-768x960.png 768w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Actigraphy is a method of monitoring activity and rest cycles. It constantly captures, non-invasively, compiles and processes information to analyze the sleep\/wake rhythm over long periods, identifying phases of activity and rest.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Find out how it can be applied to different areas of medicine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By understanding how actigraphy works, it is possible to find and apply the method in various areas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a practical and straightforward way, this is how we define actigraphy. However, we believe it is important to go into more detail on the subject and we will do so throughout this article.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Detailing definitions, learning about new technologies and providing answers to questions such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How does actigraphy work?<\/li>\n\n\n\n<li>What are the advantages of actigraphy?<\/li>\n\n\n\n<li>Are there other applications for actigraphy besides sleep medicine?<\/li>\n\n\n\n<li>How do actigraphs work today?<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">The cycle of day and night<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It is common for most living beings to interact continuously with a period of constant environmental change: the <strong>day and night cycle<\/strong>due to the rotation of the earth.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This relationship exerted a strong influence on the evolutionary process in such a way that a series of physiological and behavioral oscillations are expressed in a synchronized way while the interaction with these periods took place and still takes place.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The consequences of the interaction of day and night cycles are also observed in humans, where <strong>physiological events such as a fall or rise in respiratory rate, hormone release, thermoregulation and others<\/strong> oscillate over periods of approximately 24 hours and can be analyzed longitudinally, so that it is possible to obtain a fairly complete picture of what happens in our body over the course of a day.<br>And it is to fully understand this panorama that actigraphy is so important<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How does actigraphy work?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Actigraphy is carried out using a <a href=\"https:\/\/condor.fabbricaweb.com.br\/acttrust\/\">actimeter<\/a><\/strong>This is a device that usually looks a lot like a watch and is commonly worn on the individual&#8217;s non-dominant arm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The equipment registers movement by means of at least one accelerometer, which is used to capture movement. This measurement normally takes place on a minute-by-minute basis. Modern tachographs have other sensors, such as temperature and light sensors, among others, which can contribute to sleep and sleep analysis. <strong>circadian rhythm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The actigrapher&#8217;s job is essentially to capture information, and the data from the use of the device makes it possible:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>To detect sleep disorders and circadian rhythmicity, assessing sleep quality, estimating time in bed, detecting sleep episodes during the day, as well as estimating levels of physical activity and circadian rhythm stability in individuals&#8217; routines.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>To monitor movements using actigraphy for use in studies in the field of sleep medicine, psychiatry, occupational medicine, behavioral psychology, among other areas of knowledge in which the analysis of the expression of circadian rhythmicity plays a fundamental role for a more in-depth observation of disorders.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Over the years and through various technological and scientific innovations, today&#8217;s actigraphs can provide information on parameters of circadian rhythmicity expression and sleep with data generated through detailed analysis by pre-established parameters:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exposure to light during the day;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Expression of body temperature rhythmicity;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Events during the sleep phase;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this way, actigraphy plays an important role in gathering information that helps to make more robust and assertive diagnoses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The circadian rhythm<\/h2>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02.png\" alt=\"\" class=\"wp-image-34150\" width=\"507\" height=\"422\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02.png 720w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02-300x250.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><figcaption class=\"wp-element-caption\"><em>*The graph above represents the cycle of an individual; there are variations from case to case due to various factors.<br>References: https:\/\/images.app.goo.gl\/aXL3RWJeGrtmf6ji6<br>https:\/\/images.app.goo.gl\/vKbkSXNB7Hw4G2Ey5<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Circadian rhythms (or circadian cycles) are biological cycles that last approximately 24 hours.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The interaction of natural environmental information (light\/dark cycle) with the individual&#8217;s circadian oscillator system plays an essential role in regulating various physiological and behavioral events in the body.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Among the most commonly analyzed are:<br>&#8211; Digestion;<br>&#8211; Cell renewal;<br>&#8211; Protein synthesis;<br>&#8211; Anti-inflammatory activity;<br>&#8211; Temperature control;<br>&#8211; States of wakefulness and sleep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">   <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong> In the latter, most people are aware that the rhythm is expressed over a 24-hour period.<\/strong><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By monitoring physiological and behavioral oscillations throughout the day, it is possible to propose a temporal organization between various parameters, including interaction with environmental events.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The graphic that opens this section of our article is an example of what the organization might look like<br>internal temporal rhythms with circadian expression. It is possible to identify at what time of day certain physiological states stand out and, by analyzing these states, indicate possible dysfunctions that could point to physical and\/or psychological health problems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The advantage of actigraphy over other methods<\/h2>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/Imagem_01-1-768x588-1.jpg\" alt=\"\" class=\"wp-image-34194\" width=\"445\" height=\"339\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Many of these events, whose characteristic is the identification of circadian expression, can only be monitored using specific behavioral testing protocols, invasively and in a laboratory environment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The great advantage of actimetry is that it provides information on people&#8217;s habits in their natural environment over a long period of time in a non-invasive way. Using the actigraph, it is possible to extract data that may or may not support the hypotheses previously raised, as well as other information that makes up a more complete diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Clinical application of actigraphy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Known for its application in the field of sleep medicine and chronobiology, the use of actigraphy can be applied in other areas of research, development and medicine, providing data for diagnoses and clinical treatments in other fields, as shown by a series of scientific articles published in various countries found in the Pubmed database. Below, we list some areas of medicine that have made use of actigraphy:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Cardiology<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An article from the New York Heart Classification describes the use of the actigraph in 35 elderly patients with Type I to III heart failure. The patients wore the device on their non-dominant wrist for 9 months and the information collected showed a lack of mood with fewer movements and more circadian changes. In addition, the authors mention that a lack of daily mood is a predictor of a greater number of hospital admissions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Chronobiology<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Several studies in the field of chronobiology use actimeters to observe the expression of circadian rhythmicity. It is possibly one of the areas in which actigraphy is used most routinely. Through actigraphy, it is possible to detect alterations in the expression of circadian rhythmicity in treatments, monitor the rhythm of activity and rest of shift workers, identify rhythm disturbances, as well as studies that identify seasonal oscillations in behavior. In a recent study, entitled &#8220;Sleep misalignment and circadian rhythm impairment in long-haul bus drivers under a two-up operations system&#8221; The study, which evaluated bus drivers with actigraphy, found that the operation with the highest risk work routine negatively affects the expression of circadian rhythmicity associated with sleep fragmentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Sleep Disorders<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study &#8220;Behavioral correlates of sleep-disordered breathing in older men&#8221;, using data obtained through actigraphy and polysomnography, followed 2849 men over the age of 65 with untreated sleep apnea. It was observed that total sleep time assessed by actimeters was associated with daytime sleepiness, poor sleep quality and sleep disturbances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In another study, entitled &#8220;Comparison of sleep quality assessed by actigraphy and questionnaires to healthy subjects&#8221;, the authors identified an association between parameters usually used to analyze circadian rhythmicity and self-reported sleep quality in healthy individuals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Chronic Pain Conditions<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the pilot study &#8220;Objective and subjective assessment of sleep in chronic low back pain patients<br>compared with healthy age and gender matched controls&#8221; (Objective and subjective evaluation of sleep in patients with chronic low back pain compared with healthy age and gender matched controls), quantitatively and qualitatively evaluated the sleep of people with chronic low back pain, where 15<br>of these had symptoms and the other 15 were the control group.<br>Objective (quantitative) data was obtained using actigraphy and subjective (qualitative) data using a questionnaire. It was observed that individuals with chronic low back pain had poorer quality sleep, associated with increased daytime sleepiness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Women&#8217;s Medicine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study &#8220;Effect of external motion on correspondence between infant actigraphy and maternal<br>diary&#8221; (Effect of external movement on the correspondence between infant actigraphy and maternal daily life), carried out with 112 women, aimed to objectively measure the impact of sleep fragmentation and its influence on postpartum depression. Using actigraphy, it was found that sleeping at least one hour during the day was correlated with lower rates of postpartum depression.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Neurology<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The actigraph was used in patients who found it difficult to perform full-night polysomnography, such as people with dementia. Actigraphy was also used to collect data for the report &#8220;Melatonin fails to improve sleep or agitation in doubleblind randomized placebo-controlled trial of institutionalized patients with Alzheimer&#8217;s disease&#8221;, to improve the expression of circadian rhythmicity in patients with a probable diagnosis of Alzheimer&#8217;s disease and to analyse the effects of melatonin on their sleep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, from the actigraphy analysis, it was possible to observe that there were no differences in sleep and rhythm parameters, which could perhaps be affected by the use of questionnaires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&#8211; Actigraphy and Psychiatry<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study &#8220;Anxiety symptoms and objectively measured sleep quality in older women&#8221;, carried out with 3040 older women (86 years on average), aimed to establish a correlation between sleep patterns and anxiety.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the methodology, the actigraph was used to collect data on total sleep time, sleep efficiency, latency and other parameters. Poor sleep quality and greater sleep fragmentation were observed in older women and were not associated with other types of behavioral disorders.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the article &#8220;Activity\/rest rhythm of depressed adolescents undergoing therapy: case studies&#8221;, adolescents with depressive disorders were followed up by actigraphy recording for 13 consecutive weeks. A relationship was observed between high scores on the CDRS-R (a questionnaire that assesses depressive symptoms) and a stable decrease in the expression of activity and rest rhythms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Finalizing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Combined with other methods, tests and equipment, or through its exclusive use, it is clear that actigraphy has proven to be of great value in advancing data collection, diagnosis and validation of hypotheses in various fields of medicine and health sciences, both in the clinical and scientific fields, in order to guide professionals from different areas to prescribe more assertive and efficient treatments.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/condor.fabbricaweb.com.br\/contato\/\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"427\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1.png\" alt=\"\" class=\"wp-image-34124\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1.png 1024w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1-300x125.png 300w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1-768x320.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/condor.fabbricaweb.com.br\/contato\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contact us<\/a><\/div>\n<\/div>\n    \t","protected":false},"excerpt":{"rendered":"<p>Actigraphy is a method of monitoring activity and rest cycles. It constantly captures, non-invasively, compiles and processes information to analyze the sleep\/wake rhythm over long periods, identifying phases of activity and rest. Find out how it can be applied to different areas of medicine By understanding how actigraphy works, it is possible to find and [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":34156,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[11],"tags":[],"class_list":["post-18","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actigraphy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is actigraphy? - Condor Instruments<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is actigraphy? - Condor Instruments\" \/>\n<meta property=\"og:description\" content=\"Actigraphy is a method of monitoring activity and rest cycles. It constantly captures, non-invasively, compiles and processes information to analyze the sleep\/wake rhythm over long periods, identifying phases of activity and rest. Find out how it can be applied to different areas of medicine By understanding how actigraphy works, it is possible to find and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/condor.fabbricaweb.com.br\/en\/o-que-actigrafia\/\" \/>\n<meta property=\"og:site_name\" content=\"Condor Instruments\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-26T18:28:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-24T15:11:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"819\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Condor\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Condor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/\"},\"author\":{\"name\":\"Condor\",\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/#\\\/schema\\\/person\\\/86cd767bdd3b9c879fa81c8ceecb2aab\"},\"headline\":\"What is actigraphy?\",\"datePublished\":\"2021-02-26T18:28:26+00:00\",\"dateModified\":\"2026-08-24T15:11:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/\"},\"wordCount\":1687,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/CONDOR-POST-NOVO-819x1024-1.png\",\"articleSection\":[\"Actigraphy\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/\",\"url\":\"https:\\\/\\\/condor.fabbricaweb.com.br\\\/en\\\/o-que-actigrafia\\\/\",\"name\":\"What is actigraphy? 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