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Body-positive online content (BPOC) has recently become widespread, yet the factors that explain its association with body satisfaction have scarcely been studied. The current study investigates the indirect association between the self-reported frequency of viewing BPOC and body satisfaction through body appreciation and the moderating roles of body-ideal internalization, self-esteem, intentional searching, and gender. Utilizing survey data from 1530 Czech adolescents aged 13-18 (M=15.4, SD=1.7, 50 % girls), the present study found limited support for an indirect connection between the frequency of viewing BPOC and body satisfaction through body appreciation. Nonetheless, an indirect association appeared among adolescents with average and above-average frequencies for intentional searching for BPOC. Other investigated moderating factors were not significant. The present findings suggest that BPOC may be positively associated with body image, but only for those who deliberately search for it. The study highlights the importance of individual moderating factors in the context of BPOC and the remaining research gaps, such as the examination of its various types and aspects and their relationship with body image.
- Klíčová slova
- Adolescents, Body appreciation, Body satisfaction, Body-ideal internalization, Body-positive online content, Self-esteem,
- MeSH
- lidé MeSH
- mladiství MeSH
- obranné mechanismy MeSH
- osobní uspokojení MeSH
- představa o vlastním těle * psychologie MeSH
- průzkumy a dotazníky MeSH
- sebepojetí * MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research.
- Klíčová slova
- Body appreciation, Body appreciation Scale-2 (BAS-2), Cross-cultural, Measurement invariance, Multi-group confirmatory factor analysis (MG-CFA), Psychometrics, Structural analysis,
- MeSH
- faktorová analýza statistická MeSH
- genderová identita * MeSH
- jazyk (prostředek komunikace) MeSH
- lidé MeSH
- představa o vlastním těle * psychologie MeSH
- průzkumy a dotazníky MeSH
- psychometrie MeSH
- reprodukovatelnost výsledků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Recent findings show that food craving represents an important co-factor in overweight and obesity etiology and its severity represents a good predictor of relapse during active weight control. Child overweight and obesity also represents significant predictive factor of adulthood obesity and evidence about its incidence in children is therefore important. In order to achieve this evidence the indices of food craving has measured in 150 older school age children (54 boys and 96 girls; mean age 13.6 ± 1.2). The food craving symptoms were measured by validated Czech translation of the General Food-Craving Questionnaire-Trait (G-FCQ-T). Body proportions of children were indexed by body-mass index (BMI). BMI were assessed according to cut-off points BMI references from the Czech Republic. Results have shown that older school children have experience with food craving symptoms, and that intensity of these symptoms is significantly associated with BMI value (r = 0.55; p < 0.0001). Statistical analysis also revealed higher incidence of food craving symptoms intensity in girls. These findings provide basic normative data about food craving symptoms occurrence and intensity in older school age children group. Presented results also indirectly support the hypothesis that food craving could represent important co-factor in childhood obesity etiology. The consequences for obesity psychotherapy will be discussed.
BACKGROUND: The increased prevalence of overweight and obesity in the Czech Republic and Slovakia has led to heightened emphasis on weight control, particularly among women. Our aim is to explore body image perceptions among women in both countries and compare their attitudes, focusing on the relationship between body image and body mass index (BMI), height, weight, body fat and the weight control. METHODS: The cross-sectional study involved 358 female students from the University of Pardubice and Constantine the Philosopher University in Nitra, with equal representation from the Czech Republic and Slovakia. Body parameters were assessed using anthropometric methods and the InBody 230 diagnostic device, while participants' perceptions of their bodies were evaluated using the Body Shape Questionnaire. RESULTS: The results confirmed that BMI did not significantly influence self-perception among Slovak students, while Czech participants with increasing obesity tended to perceive themselves more negatively. Significantly higher median values for BMI (p = 0.0509), weight (p = 0.0507), height (p = 0.05) and body image (p = 0.002) were observed in the Czech Republic compared with Slovakia. No significant difference was found in weight control and fat between participants from both countries. CONCLUSIONS: Although obesity was demonstrated in both nations, body satisfaction was different for participants from the Czech Republic and Slovakia.
- MeSH
- dospělí MeSH
- index tělesné hmotnosti * MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- obezita epidemiologie psychologie MeSH
- představa o vlastním těle * psychologie MeSH
- průřezové studie MeSH
- průzkumy a dotazníky MeSH
- sebepojetí MeSH
- studenti statistika a číselné údaje psychologie MeSH
- tělesná hmotnost MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- srovnávací studie MeSH
- Geografické názvy
- Česká republika MeSH
- Slovenská republika MeSH
GOAL: Our study focuses on examining the relationship between the frequency and timing of meals and changes in BMI in the Adventist Health Study-2 (AHS-2) which represents a relatively healthy population in North America. METHODOLOGY: A longitudinal analysis was undertaken using data from 48 673 individuals monitored over an average period of 7.43 ± 1.24 years. The number of meals per day, length of nighttime fasting, eating breakfast and timing of the largest meal of the day (breakfast 5-11 a.m., lunch noon-4 p.m. or supper/dinner 5-11 p.m.) were used as independent variables. The primary output was the change in body mass index (BMI) once in a year. Linear regression analyses were adjusted for all important demographic factors and lifestyle factors. RESULTS: Consumption of 1 and 2 meals a day was associated with decrease in BMI (-0.04; 95% CI -0.06 to -0.03 and -0.02; 95% CI -0.03 to -0,01 kg.m-2 per year, respectively). On the other hand, consumption of 3 or more meals a day was associated with increase in BMI, in a linear relation (p < 0.001). BMI of those who skipped breakfast increased (0.029; 95% CI 0.021-0.037 kg.m-2 per year; p = 0.002) as compared to no BMI change in those who had breakfast (-0.0002; 95% CI -0.005 to + 0.004 kg.m-2 per year). Those, whose largest meal of the day was breakfast, recorded no significant change in BMI (-0.002 95% CI -0.008 to +0.004 kg.m-2 per year). On the contrary, the largest supper was associated with the greatest increase in BMI (0.034; 95% CI 0.029-0.040 kg.m-2 per year). CONCLUSION: Our results indicate that eating less frequently, consuming breakfast and having the largest meal in the morning hours may be effective measures to prevent weight gain.Key words: body mass index (BMI) - frequency and timing of meals - body mass regulation - breakfast.
Dynamic blockage of radio propagation paths between the user equipment (UE) and the 5G New Radio (NR) Base Station (BS) induces abrupt rate fluctuations that may lead to sub-optimal performance of the Transmission Control Protocol (TCP) protocol. In this work, we characterize the effects of dynamic human blockage on TCP throughput at the 5G NR air interface. To this aim, we develop an analytical model that expresses the TCP throughput as a function of the round-trip time (RTT), environmental, and radio system parameters. Our results indicate that the blockage affects TCP throughput only when the RTT is comparable to the blocked and non-blocked state durations when the frequency of state changes is high. However, such conditions are not typical for dynamic body blockage environments allowing TCP to benefit from the high bandwidth of 5G NR systems fully.
PURPOSE: Absorbed dose calibration for gamma stereotactic radiosurgery is challenging due to the unique geometric conditions, dosimetry characteristics, and nonstandard field size of these devices. Members of the American Association of Physicists in Medicine (AAPM) Task Group 178 on Gamma Stereotactic Radiosurgery Dosimetry and Quality Assurance have participated in a round-robin exchange of calibrated measurement instrumentation and phantoms exploring two approved and two proposed calibration protocols or formalisms on ten gamma radiosurgery units. The objectives of this study were to benchmark and compare new formalisms to existing calibration methods, while maintaining traceability to U.S. primary dosimetry calibration laboratory standards. METHODS: Nine institutions made measurements using ten gamma stereotactic radiosurgery units in three different 160 mm diameter spherical phantoms [acrylonitrile butadiene styrene (ABS) plastic, Solid Water, and liquid water] and in air using a positioning jig. Two calibrated miniature ionization chambers and one calibrated electrometer were circulated for all measurements. Reference dose-rates at the phantom center were determined using the well-established AAPM TG-21 or TG-51 dose calibration protocols and using two proposed dose calibration protocols/formalisms: an in-air protocol and a formalism proposed by the International Atomic Energy Agency (IAEA) working group for small and nonstandard radiation fields. Each institution's results were normalized to the dose-rate determined at that institution using the TG-21 protocol in the ABS phantom. RESULTS: Percentages of dose-rates within 1.5% of the reference dose-rate (TG-21+ABS phantom) for the eight chamber-protocol-phantom combinations were the following: 88% for TG-21, 70% for TG-51, 93% for the new IAEA nonstandard-field formalism, and 65% for the new in-air protocol. Averages and standard deviations for dose-rates over all measurements relative to the TG-21+ABS dose-rate were 0.999±0.009 (TG-21), 0.991±0.013 (TG-51), 1.000±0.009 (IAEA), and 1.009±0.012 (in-air). There were no statistically significant differences (i.e., p>0.05) between the two ionization chambers for the TG-21 protocol applied to all dosimetry phantoms. The mean results using the TG-51 protocol were notably lower than those for the other dosimetry protocols, with a standard deviation 2-3 times larger. The in-air protocol was not statistically different from TG-21 for the A16 chamber in the liquid water or ABS phantoms (p=0.300 and p=0.135) but was statistically different from TG-21 for the PTW chamber in all phantoms (p=0.006 for Solid Water, 0.014 for liquid water, and 0.020 for ABS). Results of IAEA formalism were statistically different from TG-21 results only for the combination of the A16 chamber with the liquid water phantom (p=0.017). In the latter case, dose-rates measured with the two protocols differed by only 0.4%. For other phantom-ionization-chamber combinations, the new IAEA formalism was not statistically different from TG-21. CONCLUSIONS: Although further investigation is needed to validate the new protocols for other ionization chambers, these results can serve as a reference to quantitatively compare different calibration protocols and ionization chambers if a particular method is chosen by a professional society to serve as a standardized calibration protocol.
- MeSH
- celková dávka radioterapie MeSH
- fantomy radiodiagnostické MeSH
- kalibrace normy MeSH
- klinické protokoly normy MeSH
- radiochirurgie přístrojové vybavení metody normy MeSH
- radiometrie metody normy MeSH
- voda MeSH
- vzduch MeSH
- záření gama terapeutické užití MeSH
- Publikační typ
- časopisecké články MeSH
- multicentrická studie MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Geografické názvy
- Spojené státy americké MeSH
- Názvy látek
- voda MeSH
Regular physical activity leads to physical and mental health benefits. Previous studies have shown physical activity to be associated with body image and gender. The aim of this cross-sectional study was to explore the associations of body image with physical activity of adolescents and whether gender modifies this association. We obtained data on body image and physical activity as part of the Health Behaviour in School-Aged Children study in 2010 from Slovakia (n = 8042, age 11-15 years, 49% boys, response rate: 79.5%). Adolescents answered questions about their body image and the frequency of their physical activity. Sufficient physical activity was more likely in adolescents perceiving themselves as fat (OR = 0.63, 95%CI 0.54-0.73) and in boys (OR = 2.15, 95%CI 1.92-2.42). A poor body image among girls was not associated with physical activity, whereas among boys it was associated with less physical activity. Gender seems to moderate the relationship between body image and physical activity in youths. Health promotion should be targeted in particular at boys with a negative body image, as they are at higher risk of physical inactivity.
- MeSH
- chování mladistvých * MeSH
- dítě MeSH
- lidé MeSH
- mladiství MeSH
- pohlavní dimorfismus MeSH
- pohybová aktivita * MeSH
- představa o vlastním těle * MeSH
- průřezové studie MeSH
- průzkumy a dotazníky MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Slovenská republika MeSH
Some studies have suggested that there could be an association between the duration of sleep in humans and development of the obesity. We have analyzed the group of the probands (n = 3970, 2038 males and 1932 females, aged 18-65 years), with permanent address in the Central or South Bohemia. We ascertained the relationship between the duration of their sleep (obtained per questionnaire) and body mass index, weight, height, the value of systolic and diastolic blood pressure, heart rate, waist and hip circumference, the values of total-, high density- and low density- cholesterol, thyroid hormone and body exercise performed. The optimal values of the body mass index (and optimal body weight) were associated with the duration of sleep 7 hours per night (P < 0.001). This association was found both in males and females and in both districts. Other anthropometrical and biochemical parameters were not associated with the sleep duration.
- MeSH
- biologické markery krev MeSH
- časové faktory MeSH
- dospělí MeSH
- hormony štítné žlázy krev MeSH
- index tělesné hmotnosti MeSH
- krevní tlak MeSH
- lidé středního věku MeSH
- lidé MeSH
- lipidy krev MeSH
- mladiství MeSH
- mladý dospělý MeSH
- obezita krev etiologie patofyziologie MeSH
- obvod pasu MeSH
- průzkumy a dotazníky MeSH
- rizikové faktory MeSH
- senioři MeSH
- spánek * MeSH
- spánková deprivace krev komplikace patofyziologie MeSH
- srdeční frekvence MeSH
- tělesná hmotnost * MeSH
- tělesná výška MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- biologické markery MeSH
- hormony štítné žlázy MeSH
- lipidy MeSH
OBJECTIVE: To study the relationships between the Eating Inventory (EI) factors (restraint, disinhibition and hunger), body adiposity and prevalence of selected diseases in a quota sample of Czech adults. SUBJECTS AND METHODS: The sample included 1429 men and 1624 women who were interviewed individually by trained investigators. The sample was quota representative--for gender, age, size of residential location, region and socioeconomic status in Czech adults. Anthropometric data, socioeconomic and lifestyle information were obtained. Subjects filled out the EI questionnaire. Physicians reported about subjects' morbidity. RESULTS: Backward stepwise regression analysis revealed that restraint and disinhibition were significant predictors of body mass index (BMI) along with gender, age, parental obesity, weight loss attempts, present dieting and educational level. The same factors plus income predicted the waist circumference. BMI and waist circumference were negatively related to restraint but positively to disinhibition. According to logistic regression analysis restraint and disinhibition were significantly associated with hypertension, cardiovascular diseases and hyperlipidaemia. Diabetes was significantly related to restraint and hunger scores. The observed association between EI factors and diseases remained significant even when BMI and age were taken into account. CONCLUSION: As shown in earlier studies, disinhibition was positively and restraint negatively associated with BMI and waist circumference. For the first time, factors of the EI were also identified as significant predictors of diseases characterizing the metabolic syndrome.
- MeSH
- diabetes mellitus psychologie MeSH
- dospělí MeSH
- hyperlipidemie psychologie MeSH
- hypertenze psychologie MeSH
- index tělesné hmotnosti MeSH
- inhibice (psychologie) * MeSH
- lidé středního věku MeSH
- lidé MeSH
- logistické modely MeSH
- metabolický syndrom psychologie MeSH
- motivace MeSH
- obezita psychologie MeSH
- prevalence MeSH
- průzkumy a dotazníky MeSH
- složení těla MeSH
- stravovací zvyklosti * MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
