Accelerometer data
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Poškození mozku představuje v současné době významný problém nejenom pro jeho stoupající četnost, ale především pro svou závažnost. Léčba je finančně velmi náročná, zejména u mozkových traumat postihujících převážně mladší věkové skupiny v produktivním věku. Incidence traumatického poškození mozku je v evropských průmyslových zemích vysoká, přibližně 250 - 300 postižených na 100 000 obyvatel (17). Podle dat z roku 2010 z Ústavu zdravotnické informatiky a statistiky České republiky je nově přijato do nemocnice 48 000 pacientů ročně s diagnózou cévní mozková příhoda. V České republice neexistují specializovaná neurorehabilitační pracoviště, která by zajišťovala včasnou intenzivní a interprofesní rehabilitaci pacientů po poškození mozku. U těchto pacientů se setkáváme s celým komplexem obtíží: motorických, kognitivních, fatických, smyslových a psychických. Klíčové je provádět funkční diagnostiku a poté objektivní posouzení efektu celé rehabilitační intervence, a také míru spolupráce a motivace pacientů při individuální neurorehabilitaci. Většina diagnosticko-terapeutických přístrojových metod je pro běžnou rehabilitační klinickou praxi buď obtížně nebo zcela nedostupná z důvodů ekonomických nebo z důvodu technologické náročnosti. Použití senzoru – akcelerometru ve formě náramků se jeví jako výhodná možnost i u pacientů s vyšším stupněm funkčního postižení (disability) (10). Za účasti 1. LF UK a VFN v Praze, Všeobecné zdravotní pojišťovny a firmy Princip vznikl projekt na využití akcelerometru – náramku pro monitoring pohybu horních končetin u pacientů po poškození mozku.
Brain damage presently represents a significant problem not only for increasing frequency, but especially for the depth of the situation. The therapy is very costly particularly in brain trauma affecting predominantly younger age groups at the productive age. Incidence of brain injury in the European industrial countries is high reaching approximately 250 to 300 individuals per 100.000 individuals in population (17). According to data for 2010 issue by the Institute of Medical Information and Statistic of the Czech Republic, 48.000 patients with the diagnosis of vascular brain event are admitted to hospitals annually. There are no specialized neurorehabilitation workplaces in the Czech Republic, which would provide timely intensive and inter-professional rehabilitation of patients with brain injury. In these patients we encounter a whole complex of troubles: motor, cognitive, fatigue, sensual and psychic. Functional diagnostics and objective evaluation of the effect of the complex rehabilitation intervention are crucial as well as the extent of collaboration and motivation of the patients in individual rehabilitation. Most diagnostic-therapeutic instrumental methods are unobtainable or difficult to obtain in common rehabilitation practice for economic reasons or technical demands. The use of a sensor – accelerometer in the form of a bracelet appears to be a suitable possibility even in patients with a high degree of functional damage (disability) (10). The project for application of accelerometer – a bracelet for monitoring of the locomotion of upper extremities in patients after brain damage originated with the participation of the First Medical Faculty and General Teaching Hospital in Prague, General Medical Insurance Company and the firm Princip.
Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron (CP), together with a traditional method, based on area of the confidence ellipse (ACE). Ten patients (Pts) with cerebellar ataxia and eleven healthy individuals of control group (CG) participated in the study. The results show a significant increase of volume of the CP (CPV) in Pts or CG standing on foam surface with eyes open (EO) and eyes closed (EC) after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confirming the possibility of quantification of postural instability by the introduced method of CPV.
- MeSH
- akcelerometrie metody MeSH
- dospělí MeSH
- lidé MeSH
- postura těla fyziologie MeSH
- posturální rovnováha fyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Parent-child patterns in objectively measured movement behaviours were the highlight of this study. A total of 381 families (337 mothers, 256 fathers, 190 daughters, and 191 sons) from 36 randomly selected schools and kindergartens provided valid accelerometer data. Sedentary behaviour and physical activity (PA) were assessed using ActiGraph accelerometers. Spearman's rho was used to evaluate parent-child associations, while logistic regression analysis (the backward LR method) was used to recognize factors related to children's achievement of PA recommendations. Results indicated that girls engaged more in light PA, while boys showed higher levels of moderate and vigorous PA. Mothers spent less time sitting and more time in light PA compared to fathers, resulting in higher total PA levels. Father-son pairs showed a stronger association in total PA than mother-son pairs. Children aged 6-10 years and those with mothers who engaged in more vigorous PA were more likely to meet PA recommendations compared to younger children and those with less active mothers.
- Publikační typ
- časopisecké články MeSH
Cílem studie bylo ověřit validitu a reliabilitu akcelerometru S3+. Ten je volitelnou součástí nového modelu kardiotachometru Polar RX5. Čtyři vytrvalostní sportovci absolvovali na běhátkovém ergometru (0% sklon) stupňovaný zátěžový test s počáteční rychlostí 5 kmh -1 se zvýšením o 0,5 kmh -1 každých 200 metrů. Test byl prováděn do odmítnutí a od rychlosti 8 kmh -1 byla direktivně chůze vystřídána běžeckou lokomocí. Pro stanovení míry stability měření byl test za obdobných podmínek opakován. Výsledky studie ukázaly, že pro běžeckou lokomoci chybovost přístroje je v rozmezí chyby udávané výrobcem (3 %). Pro chůzi je chybovost vyšší (10 %). Spolehlivost měření byla ve všech sledovaných parametrech vysoká (r>0,80) kromě stability měření celkové vzdálenosti u chůze (r=0,53).
The purpose of this study was to evaluate the validity and reliability of the accelerometer S3+. This is an optional part of the new model heart rate monitor Polar RX5. Four endurance athletes completed the on treadmill (0% slope) graded exercise test with an initial speed of 5 kmh- 1 with the increase of 0.5 kmh -1 every 200 meters. The test was conducted to rejection. From 8 kmh -1 walking was directive turned to running locomotion. Test was repeated under similar conditions to deter- mine the degree of measurement stability. The study results showed that accuracy of running measurement is within the error provided by the manufacturer (3%). For walking, the error rate is higher (10%). Reliability of measurements was observed in all parameters is high (r> 0, 80) except to the overall stability of the measurement of walking distance (r = 0.53).
- Klíčová slova
- akcelerometr,
- MeSH
- akcelerometrie * normy přístrojové vybavení MeSH
- běh * MeSH
- chůze * MeSH
- dospělí MeSH
- ergometrie MeSH
- interpretace statistických dat MeSH
- kalibrace MeSH
- kyselina mléčná MeSH
- lidé MeSH
- reprodukovatelnost výsledků * MeSH
- software MeSH
- sporty MeSH
- srdeční frekvence MeSH
- statistika jako téma MeSH
- zátěžový test MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
BACKGROUND: Despite the availability of physical activity (PA) interventions, many older adults are still not active enough. This might be partially explained by the often-limited effects of PA interventions. In general, health behavior change interventions often do not focus on contextual and time-varying determinants, which may limit their effectiveness. However, before the dynamic tailoring of interventions can be developed, one should know which time-dependent determinants are associated with PA and how strong these associations are. OBJECTIVE: The aim of this study was to examine within-person associations between multiple determinants of the capability, opportunity, motivation, and behavior framework assessed using Ecological Momentary Assessment (EMA) and accelerometer-assessed light PA, moderate to vigorous PA, and total PA performed at 15, 30, 60, and 120 minutes after the EMA trigger. METHODS: Observational data were collected from 64 healthy older adults (36/64, 56% men; mean age 72.1, SD 5.6 y). Participants were asked to answer a time-based EMA questionnaire 6 times per day that assessed emotions (ie, relaxation, satisfaction, irritation, and feeling down), the physical complaint fatigue, intention, intention, and self-efficacy. An Axivity AX3 was wrist worn to capture the participants' PA. Multilevel regression analyses in R were performed to examine these within-person associations. RESULTS: Irritation, feeling down, intention, and self-efficacy were positively associated with subsequent light PA or moderate to vigorous PA at 15, 30, 60, or 120 minutes after the trigger, whereas relaxation, satisfaction, and fatigue were negatively associated. CONCLUSIONS: Multiple associations were observed in this study. This knowledge in combination with the time dependency of the determinants is valuable information for future interventions so that suggestions to be active can be provided when the older adult is most receptive.
- Publikační typ
- časopisecké články MeSH
Assessing parent-child relationship in sleep behaviours is important for facilitating changes in the sleep guideline compliance in preschool age children. The aim of this study was to examine accelerometer-measured sleep quantity and quality in families with children aged 3-8 years and investigate the parents' influence on the child's sleep. The data were obtained from the Czech cross-sectional FAMIly Physical Activity, Sedentary behaviour and Sleep (FAMIPASS) study, with a final sample of 374 families. Families were recruited through the enrolment of their children in kindergartens/primary schools between March 2022 and May 2023. The sleep time window and total sleep time were assessed using a wrist-worn ActiGraph accelerometer. Participants wore this device continuously for 24 h/day over a period of 7 consecutive days. Demographic data and potential correlates were obtained via questionnaires completed by parents. Statistical analyses were completed using logistic regression and independent-samples Mann-Whitney U test. In all, 65.5% of children (60% boys, 70.9% girls) and 58.3% of parents (52.4% fathers, 64.3% mothers) achieved the recommended sleep duration. Greater sleep quantity and duration in good-quality sleep were significantly higher in girls/mothers, compared to boys/fathers. Preschoolers were more likely to comply with sleep guidelines if their mother (but not father) met the sleep recommendation and their mothers did not have a higher education level. Adhering to sleep guidelines in children was also associated with children's female gender, absence of screen device in the bedroom, and being more active. Given the high concurrence in mother-child sleep quantity, it is important to promote healthy sleep behaviours in the whole family.
- MeSH
- akcelerometrie * přístrojové vybavení MeSH
- cvičení * MeSH
- dítě MeSH
- dodržování směrnic * statistika a číselné údaje MeSH
- dospělí MeSH
- kvalita spánku MeSH
- lidé MeSH
- předškolní dítě MeSH
- průřezové studie MeSH
- průzkumy a dotazníky MeSH
- rodiče MeSH
- sedavý životní styl * MeSH
- spánek * fyziologie MeSH
- vztahy mezi rodiči a dětmi * MeSH
- Check Tag
- dítě MeSH
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- předškolní dítě MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
BACKGROUND: Between-person differences in sedentary patterns should be considered to understand the role of sedentary behavior (SB) in the development of childhood obesity. This study took a novel approach based on compositional data analysis to examine associations between SB patterns and adiposity and investigate differences in adiposity associated with time reallocation between time spent in sedentary bouts of different duration and physical activity. METHODS: An analysis of cross-sectional data was performed in 425 children aged 7-12 years (58% girls). Waking behaviors were assessed using ActiGraph GT3X accelerometer for seven consecutive days. Multi-frequency bioimpedance measurement was used to determine adiposity. Compositional regression models with robust estimators were used to analyze associations between sedentary patterns and adiposity markers. To examine differences in adiposity associated with time reallocation, we used the compositional isotemporal substitution model. RESULTS: Significantly higher fat mass percentage (FM%; βilr1 = 0.18; 95% CI: 0.01, 0.34; p = 0.040) and visceral adipose tissue (VAT; βilr1 = 0.37; 95% CI: 0.03, 0.71; p = 0.034) were associated with time spent in middle sedentary bouts in duration of 10-29 min (relative to remaining behaviors). No significant associations were found for short (< 10 min) and long sedentary bouts (≥30 min). Substituting the time spent in total SB with moderate-to-vigorous physical activity (MVPA) was associated with a decrease in VAT. Substituting 1 h/week of the time spent in middle sedentary bouts with MVPA was associated with 2.9% (95% CI: 1.2, 4.6), 3.4% (95% CI: 1.2, 5.5), and 6.1% (95% CI: 2.9, 9.2) lower FM%, fat mass index, and VAT, respectively. Moreover, substituting 2 h/week of time spent in middle sedentary bouts with short sedentary bouts was associated with 3.5% (95% CI: 0.02, 6.9) lower FM%. CONCLUSIONS: Our findings suggest that adiposity status could be improved by increasing MVPA at the expense of time spent in middle sedentary bouts. Some benefits to adiposity may also be expected from replacing middle sedentary bouts with short sedentary bouts, that is, by taking standing or activity breaks more often. These findings may help design more effective interventions to prevent and control childhood obesity.
Východiska: Lokomoci osob s poraněním páteřní míchy v oblasti Th1–L2 zajišťuje především manuální pohon invalidního vozíku. Metodika měření objemu a intenzity jejich pohybové aktivity pomocí akcelerometru ActiGraph GT3X+ není dosud jednotně stanovena. Cíle: Hlavním cílem bylo charakterizovat vliv dominance horní končetiny u paraplegických osob na hodnocení objemu pohybové aktivity měřené pomocí akcelerometru ActiGraph GT3X+ v habituálních podmínkách. Vedlejším cílem studie bylo nalezení optimálního místa fixace akcelerometru ActiGraph GT3+ v průběhu měření. Metodika: Studie se zúčastnilo 14 probandů (3 ženy a 11 mužů), všichni s dominantní pravou horní končetinou. V průběhu jednoho dne měl každý z probandů upnut jeden třívektorový akcelerometr ActiGraph GT3X+ na dorzální straně zápěstí nedominantní horní končetiny, druhý na dorzální straně dominantní horní končetiny a třetí na straně nedominantní horní končetiny v oblasti pasu. V první variantě byla statisticky vyhodnocena data, která byla ponechána v surovém stavu. Ve druhé variantě byla data před statistickým zpracováním převedena na hodnoty aktivního energetického výdeje. Výsledky: Analýza výsledků prokázala nejednoznačnou dominanci pravé horní končetiny u pravorukých probandů v průběhu měření habituální pohybové aktivity. Statisticky nejvýznamnější korelační shoda byla zjištěna mezi objemy surových dat z akcelerometrů upnutých na nedominantních horních končetinách s akcelerometry upnutými v pase (0,737; p≤0,01). Závěry: Za optimální místo fixace akcelerometru ActiGraph GT3X+ pro snímání habituální pohybové aktivity paraplegiků bylo určeno zápěstí nedominantní horní končetiny.
Background: Mobility of persons with spinal cord injury in Th1-L2 area is primarily assured by manual wheelchair propulsion. It has not been exactly determined yet which methods have to be used to evaluate the volume and the intensity of their physical activity. Objective: The principal aim of this study was to characterize the influence of upper limb dominance in paraplegic persons on the evaluation of the volume of physical activity measured with the ActiGraph GT3X+ accelerometer in habitual conditions. The secondary aim was to determine the optimal fixation position of the accelerometer during the measurement of the habitual physical activity. Methods: The study involved 14 subjects, 3 women and 11 men, all of them with a dominant right upper limb. Each of them wore three accelerometers simultaneously, one each on the non-dominant wrist and dominant wrist and one on the waist on course of one day. The data obtained from the accelerometers were used in raw, not adapted numbers. In the second version, the data were calculated as units of active energy output. Results: The results showed arguable dominance of the right upper limbs during physical activity in habitual conditions. The results of the correlation match indicated the highest similarity between the raw data obtained from accelerometers fixed in the waist with the data from accelerometers fixed in the wrist of the non-dominant upper limb 0,737 (p ≤ 0,01). Conclusions: The wrist of the non-dominant upper limb was determined as the optimal fixation point for the ActiGraph GT3X+ accelerometer for reading the habitual physical activity of paraplegics.
Human activity can be measured with actimetry sensors used by the subjects in several locations such as the wrists or legs. Actigraphy data is used in different contexts such as sports training or tele-medicine monitoring. In the diagnosis of sleep disorders, the actimetry sensor, which is basically a 3D axis accelerometer, is used by the patient in the non dominant wrist typically during an entire week. In this paper the actigraphy data is described by a weighted mixture of two distributions where the weight evolves along the day according to the patient circadian cycle. Thus, one of the distributions is mainly associated with the wakefulness state while the other is associated with the sleep state. Actigraphy data, acquired from 20 healthy patients and manually segmented by trained technicians, is used to characterize the acceleration magnitude during sleep and wakefulness states. Several mixture combinations are tested and statistically validated with conformity measures. It is shown that both distributions can co-exist at a certain time with varying importance along the circadian cycle.
- MeSH
- aktigrafie přístrojové vybavení metody MeSH
- bdění MeSH
- časové faktory MeSH
- cirkadiánní rytmus MeSH
- design vybavení MeSH
- lidé MeSH
- monitorování fyziologických funkcí přístrojové vybavení metody MeSH
- počítačové komunikační sítě MeSH
- spánek MeSH
- statistické modely MeSH
- telemedicína přístrojové vybavení metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
BACKGROUND: This study examined the strength, shape and direction of associations of accelerometer-assessed overall, school- and non-school-based moderate-to-vigorous physical activity (MVPA) and sedentary time (ST) with BMI among adolescents across the world. Second, we examined whether these associations differed by study site and sex. METHODS: Cross-sectional data from the IPEN Adolescent study, an observational multi-country study, were used. Participants wore an accelerometer for seven days, reported height and weight, and completed a socio-demographic survey. In total, 4852 adolescents (46.6% boys), aged 11-19 years (mean age = 14.6, SD = 1.7 years) were included in the analyses, using generalized additive mixed models. RESULTS: Adolescents accumulated on average 41.3 (SD = 22.6) min/day of MVPA and 531.8 (SD = 81.1) min/day of ST, and the prevalence of overweight and obesity was 17.2% (IOTF), but these mean values differed by country. Linear negative associations of accelerometer-based MVPA and ST with standardized BMI scores and the likelihood of being overweight/obese were found. School-based ST and non-school-based MVPA were more strongly negatively associated to the outcomes than non-school based ST and school-based MVPA. Study site moderated the associations; adolescent sex did not. No curvilinear associations were found. CONCLUSIONS: This multi-country study confirmed the importance of MVPA as a potential protective factor against overweight/obesity in adolescents. Non-school-based MVPA seemed to be the main driver of these associations. Unexpected results were found for ST, calling for further examination in methodologically sound international studies but using inclinometers or pressure sensors to provide more precise ST measures.
- MeSH
- akcelerometrie MeSH
- cvičení MeSH
- index tělesné hmotnosti MeSH
- lidé MeSH
- mladiství MeSH
- nadváha * epidemiologie prevence a kontrola MeSH
- obezita epidemiologie prevence a kontrola MeSH
- průřezové studie MeSH
- sedavý životní styl * MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- pozorovací studie MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
