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The Effects of Physical Activity Feedback on Behavior and Awareness in Employees: Study Protocol for a Randomized Controlled Trial
Karen Van Hoye,Filip Boen,Johan Lefevre
International Journal of Telemedicine and Applications , 2012, DOI: 10.1155/2012/460712
Abstract: Purpose. The SenseWear Armband (SWA) is a multisensor activity monitor that can be used in daily life to assess an individual’s physical activity level (PAL). The primary goal of this study was to analyze the impact of different types of feedback on the PAL of Flemish employees. Methods/Design. We recruited 320 sedentary employees (age, 41.0 ± 10.7 years; BMI, 26.2 ± 4.2 kg/m2) to participate in the 12-month study. Participants were randomized into one of four intervention groups after being measured for 7 days and nights by means of the SWA: (1) a minimal intervention group received no feedback (MIG, ); (2) a pedometer group was provided only information on their daily step count (PG, ); (3) a display group received feedback on calories burned, steps taken, and minutes of physical activity by means of the SWA display (DG, ); (4) a coaching group also received the display and had weekly meetings with a Personal Coach (CoachG, ). We hypothesize that participants receiving feedback (SG, DG, and CoachG) will have a greater increase in physical activity outcome variables compared to participants of the minimal intervention group. 1. Introduction Increasing daily physical activity (PA) is a key strategy for preventing or minimizing numerous chronic diseases [1, 2]. Daily PA consists of all occupational, domestic, and leisure-time activities. While participation in leisure-time activities has remained relatively stable over the years, technological advancements have drastically reduced occupational PA [3]. People spent more time at sedentary occupations or in work-related activities such as passive commuting (e.g., driving/riding in a motorized vehicle), which has a negative impact on total PA [4]. Given the benefits of regular PA and the current high prevalence of physical inactivity, people need strategies to increase their level of PA [5]. In 1996, the American College of Sports Medicine proposed PA guidelines which stated that 30 minutes of moderate-intensity exercise on most days provide some health benefits, notably, a decreased risk of chronic diseases. Moderate intensity PA is defined as activity performed at 3–6?MET and corresponds with the equivalent of walking 3-4?mph for most healthy adults. Because inactive people show measurable health benefits with only small increases in activity levels, these people should be targeted in health-promotion programs [6]. The physical activity level (PAL) of an individual is widely used as an indirect measure of physical activity energy expenditure. It can be measured or estimated from the average of 24-hour
Compliance with different physical activity recommendations and its association with socio-demographic characteristics using an objective measure
Tineke Scheers, Renaat Philippaerts, Johan Lefevre
BMC Public Health , 2013, DOI: 10.1186/1471-2458-13-136
Abstract: Data were obtained from 357 Flemish men and women (41.9 +/- 9.6 years). Physical activity was assessed for seven consecutive days using the SenseWear Armband. The prevalence of sufficient physical activity was calculated according to various public health guidelines. Logistic regressions examined the associations between socio-demographic characteristics and the odds of meeting the different guidelines.87.2% of men and 68.1% of women achieved >=150 min/week of moderate-to-vigorous physical activity (MVPA), but only 57.6% and 37.3% accumulated this amount as >=30 min/day on >=5 days/week. With regard to vigorous physical activity, 27.9% of men and 15.7% of women achieved >=75 min/week and 12.8% and 7.0% achieved >=20 min/day on >=3 days/week. In addition, 34.9% of men and 21.6% of women attained an average physical activity level (PAL) of 1.75 MET and thus met the criteria for weight maintenance. Only 16.3% of men and 14.1% of women took 10000 steps/day on 7 days/week. Women had a lower probability of achieving 30 min/day MVPA on 5 days/week (OR: 0.40), or a weekly total of 150 min or 500 MET.min MVPA or 75 min of vigorous activity compared to men (OR: 0.27-0.46). In addition, they were 50% less likely to meet the guidelines for weight maintenance. The odds of engaging in 150 min/week MVPA or attaining a PAL of 1.75 was lower with higher age. Educational level was positively related with accumulating 75 min/week of vigorous activity, but negatively with taking 10000 steps/day. Smokers were 60% less likely to participate weekly in 150 min of MVPA compared to non-smokers.The prevalence of sufficient physical activity differed greatly depending on the definition used. Women and subjects older than 35 were less likely to meet the guidelines than men and younger subjects and thus are important groups to target in future interventions.
Assessment of physical activity and inactivity in multiple domains of daily life: a comparison between a computerized questionnaire and the SenseWear Armband complemented with an electronic diary
Tineke Scheers, Renaat Philippaerts, Johan Lefevre
International Journal of Behavioral Nutrition and Physical Activity , 2012, DOI: 10.1186/1479-5868-9-71
Abstract: Data were obtained from 442 Flemish adults (41.4±9.8?years). Physical activity was questioned with the FPACQ and measured for seven consecutive days using the SenseWear Armband together with an electronic activity diary (SWD). Analogous variables were calculated from the FPACQ and SWD. Mean differences and associations between FPACQ and SWD outcomes were examined with paired t-tests and Pearson correlations. The Bland-Altman method was used to assess the level of agreement between the two methods. Main effects and interaction of gender and age groups (20–34; 35–49; 50–64?years) on differences between FPACQ and SWD outcomes were analyzed using two-way ANOVAs.All parameters of the FPACQ were significantly correlated with SWD assessments (r?=?0.21 to 0.65). Reported activity was significantly different from SWD-obtained values for all parameters, except screen time. Physical activity level, total energy expenditure and time spent in vigorous activities were significantly higher (+0.14 MET, +25.09 METhours·week-1 and +1.66 hours·week-1, respectively), and moderate activities and sedentary behavior significantly lower (-5.20 and -25.01 hours·week-1, respectively) with the FPACQ compared to SWD. Time and energy expenditure of job activities and active transport were significantly higher, while household chores, motorized transport, eating and sleeping were significantly lower with the FPACQ. Time spent in sports was lower (-0.54 hours·week-1), but energy expenditure higher (+4.18 METhours·week-1) with the FPACQ. The correspondence between methods varied with gender and age, but results differed according to the intensity and domain of activity.Despite the moderate correlations, significant differences between the two methods were found. In general, physical activity was higher and sedentary behavior lower as calculated from the FPACQ compared to SWD.
Nutritional Status of Flemish Vegetarians Compared with Non-Vegetarians: A Matched Samples Study
Peter Deriemaeker,Katrien Alewaeters,Marcel Hebbelinck,Johan Lefevre,Renaat Philippaerts,Peter Clarys
Nutrients , 2010, DOI: 10.3390/nu2070770
Abstract: The present study compares the nutritional status of vegetarian (V) with non-vegetarian (NV) subjects. A three-day food record and a health questionnaire were completed by 106 V and 106 NV matched for following characteristics: sex, age, BMI, physical activity, tobacco use and alcohol consumption. Total energy intake was not significantly different (men: V: 2,346 ± 685 kcal/d; NV: 2,628 ± 632 kcal/d; p = 0.078; women: V: 1,991 ± 539 kcal/d; NV: 1,973 ± 592 kcal/d; p = 0.849). Macronutrients intake differed significantly between the V and NV subjects for protein (men: V:12.7 ± 2.3 E%; NV:15.3 ± 4.5 E%; p = 0.003; women: V: 13.2 ± 2.3 E%; NV:16.0 ± 4.0 E%; p < 0.001), fat (men: V: 29.3 ± 8.4 E%; NV: 33.8 ± 5.3 E%; p = 0.010; women: V: 29.7 ± 6.9 E%; NV: 34.7 ± 9.0 E%; p < 0.001), and carbohydrate (men: V: 55.3 ± 10.1 E%; NV: 47.4 ± 6.9 E%; p < 0.001; women: V: 55.1 ± 7.6 E%; NV: 47.2 ± 8.2 E%; p < 0.001). The intake of most minerals was significantly different between the V and the NV subjects. V had a lower sodium intake, higher calcium, zinc, and iron intake compared to the NV subjects. Our results clearly indicate that a vegetarian diet can be adequate to sustain the nutritional demands to at least the same degree as that of omnivores. The intakes of the V subjects were closer to the recommendations for a healthy diet when compared to a group of well matched NV subjects.
Socio-economic and lifestyle factors associated with overweight in Flemish adult men and women
Nathalie Duvigneaud, Katrien Wijndaele, Lynn Matton, Peter Deriemaeker, Renaat Philippaerts, Johan Lefevre, Martine Thomis, William Duquet
BMC Public Health , 2007, DOI: 10.1186/1471-2458-7-23
Abstract: This cross-sectional epidemiological study was conducted by the Flemish Policy Research Centre Sport, Physical Activity and Health between October 2002 and February 2004 in 46 Flemish communities. A total of 4903 Flemish adults (2595 men and 2308 women), aged 18 to 75 years, from a population-based random sample were included in the analysis. Body weight, height and WC were measured, and socio-economic and lifestyle factors were reported by means of validated questionnaires.The results of the logistic regressions revealed that age is positively associated with overweight in both genders. Alcohol consumption is associated with overweight only in men. Men smoking in the past and watching TV >11 h/week have significantly higher OR's for overweight, while men who participate in health related sports >4 h/week have significantly lower OR's for overweight. In women, watching TV >9 h/week was positively associated with overweight. Women who are current smokers or participate in health related sports >2.5 h/week or with a higher educational level have significantly lower odds for overweight. Different results are observed between the first (BMI) and the second model (WC) in both genders. In men, the models differ for education and health related sports, while in women they differ for smoking status and leisure time physical activity.The present study confirms the contention that overweight is a multifactorial problem. Age and TV viewing are positively associated with overweight, while educational level and health related sports are negatively related to overweight in both genders. In men, alcohol consumption and smoking in the past are also among the lifestyle factors associated with overweight. This study also indicates that BMI and WC do not have the same discriminative function regarding different lifestyle factors.Notwithstanding the growing attention to overweight due to its impact on public health and health care costs, overweight prevalences are still escalating into
Dietary factors associated with obesity indicators and level of sports participation in Flemish adults: a cross-sectional study
Nathalie Duvigneaud, Katrien Wijndaele, Lynn Matton, Renaat Philippaerts, Johan Lefevre, Martine Thomis, Christophe Delecluse, William Duquet
Nutrition Journal , 2007, DOI: 10.1186/1475-2891-6-26
Abstract: Data for this cross-sectional study, including anthropometric measurements, 3-day diet diary and physical activity questionnaire, were collected by the Flemish Policy Research Centre Sport, Physical Activity and Health (SPAH) between October 2002 and April 2004. Results of 485 adult men and 362 women with plausible dietary records were analysed. Analyses of covariance were performed to determine the differences in dietary intake between normal weight, overweight and obese subjects, and between subjects with different levels of sports participation.Total energy intake, protein and fat intake (kcal/day) were significantly higher in obese subjects compared to their lean counterparts in both genders. Percentage of energy intake from fat was significantly higher in obese men compared to men with normal weight or WC. Energy percentages from carbohydrates and fibres were negatively related to BMI and WC in men, whereas in women a higher carbohydrate and fibre intake was positively associated with obesity. Alcohol intake was positively associated with WC in men. Subjects participating in health related sports reported higher intake of carbohydrates, but lower intake of fat compared to subjects not participating in sports.This study supports the evidence that carbohydrate, fat, protein and fibre intake are closely related to BMI and WC. The sex differences for dietary intake between obese men and women might reflect the generally higher health consciousness of women. Alcohol intake was only associated with WC, emphasizing the importance of WC as an additional indicator in epidemiological studies. Besides enhancing sports and physical activity, it is necessary to improve the knowledge about nutrition and to promote the well-balanced consumption of wholesome food.Obesity is a worldwide escalating problem caused by a complex interaction of genetic, socio-demographic, behavioural and environmental factors. There is large evidence that obesity develops when energy intake continuo
Physical Activity Assessment in Patients with Axial Spondyloarthritis Compared to Healthy Controls: A Technology-Based Approach
Thijs Willem Swinnen, Tineke Scheers, Johan Lefevre, Wim Dankaerts, Rene Westhovens, Kurt de Vlam
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0085309
Abstract: Introduction Traditionally, assessment in axial Spondyloarthritis (aSpA) includes the evaluation of the capacity to execute tasks, conceptualized as physical function. The role of physical activity, defined as movement-related energy expenditure, is largely unknown and almost exclusively studied using patient-reported outcome measures. The aims of this observational cross-sectional study are to compare physical activity between patients with aSpA and healthy controls (HC) and to evaluate the contribution of disease activity to physical activity differences between groups. Methods Forty patients with aSpA were matched by age, gender, period of data acquisition in terms of days and season to 40 HC. Physical activity was measured during five consecutive days (three weekdays and two weekend days) using ambulatory monitoring (SenseWear Armband). Self-reported disease activity was measured by the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI). Differences in physical activity between patients with aSpA and HC were examined with Wilcoxon signed-rank tests and a mixed linear model. Difference scores between patients and HC were correlated with disease activity. Results Average weekly physical activity level (Med(IQR); HC:1.54(1.41–1.73); aSpA:1.45(1.31–1.67),MET) and energy expenditure (HC:36.40(33.43–41.01); aSpA:34.55(31.08–39.41),MET.hrs/day) were significantly lower in patients with aSpA. Analyses across intensity levels revealed no significant differences between groups for inactivity and time spent at light or moderate physical activities. In contrast, weekly averages of vigorous (HC:4.02(1.20–12.60); aSpA:0.00(0.00–1.20),min/d), very vigorous physical activities (HC0.00(0.00–1.08); aSpA:0.00(0.00–0.00),mind/d) and moderate/(very)vigorous combined (HC2.41(1.62–3.48); aSpA:1.63(1.20–2.82),hrs/d) were significantly lower in patients with aSpA. Disease activity did not interact with differences in physical activity between patients with aSpA and HC, evidenced by non-significant and very low correlations (range: ?0.06–0.17) between BASDAI and HC-aSpA patients' difference scores. Conclusions Patients with aSpA exhibit lower physical activity compared to HC and these differences are independent of self-reported disease activity. Further research on PA in patients with aSpA should be prioritized.
Associa??o do envolvimento à actividade física e à aptid?o em jovens madeirenses
Ramos,Elisa C.; Freitas,Duarte L.; Maia,José A.; Beunen,Gaston P.; Claessens,Albrecht L.; Gouveia,élvio R; Marques,António T.; Thomis,Martine A.; Lefevre,Johan A.;
Revista Portuguesa de Ciências do Desporto , 2008,
Abstract: the main purpose of this study was to investigate the association between the area of residence (urban, semi-urban and rural) and physical activity and fitness in children and adolescents from madeira island. the sample included 1498 participants, 758 boys and 740 girls, of the ?madeira growth study?. physical activity was assessed by means of a questionnaire and physical fitness was measured with the eurofit test battery. children and adolescents from urban areas showed higher values in regular sports and activities. results for physical fitness do not favour one socio-geographic group. boys from urban and semi-urban area?s performed significantly better for flexibility, upper body muscular endurance, abdominal strength and power, whereas boys from the rural area performed better for aerobic endurance, static strength, running speed, agility and balance. girls from urban and semi-urban area?s obtained better results for running speed and agility, whereas girls from rural area performed better for static strength and upper body muscular endurance. programmes aimed at the elimination of urban-rural differences in physical activity and fitness, associated to socio-geographic area, should focus on increasing specific fitness levels, which might result in improved health conditions of children and adolescents living in madeira.
O sujeito coletivo que fala
Lefevre, Fernando;Lefevre, Ana Maria Cavalcanti;
Interface - Comunica??o, Saúde, Educa??o , 2006, DOI: 10.1590/S1414-32832006000200017
Abstract: this paper discusses the discourse of the collective subject as a qualitative-quantitative proposal for opinion polling or social representation research. it proposes that research use the collective opinion as a empirical variable of qualitative and quantitative nature that may, by the interposition of specific discourse subject, to express itself directly without the mediation of researchers meta discourse and avoiding to transform the opinion in a quantitative variable.
Saúde como nega??o da nega??o: uma perspectiva dialética
Lefevre, Fernando;Lefevre, Ana Maria Cavalcanti;
Physis: Revista de Saúde Coletiva , 2007, DOI: 10.1590/S0103-73312007000100002
Abstract: this paper presents a view of health and of health-disease relationship based on a dialectic perspective, placing the problem in the contemporary historical context. the issues consider a tension between the hegemonic view that, from a synchronic perspective, means health production, whose object is the sick one-consumer. so it implies the permanent reproduction of a system that produces health goods and services, and the counter-hegemonic perspective, which, from the diachronic and historical viewpoints of health promotion, and tackling the basic causes of human sickening, starts reading and facing the health-disease relation, in order to overcome medical semiology, whose object is the sick person, towards a general or semiotic semiology, whose object is disease.
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