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Four commonly used laboratory methods include hydrodensitometry underwater weighingair displacement plethysmography Bod Pod, Life Measurement Instruments, Concord, CAisotope dilution, and dual-energy X-ray difference between body fat percentage and bmi DXA. Field methods include bioelectrical impedance analysis BIAnear-infrared interactance NIRskinfolds, and anthropometric circumference measurement.
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Differences in muscular activity between obese and non-obese workers during manual lifting. Diferencias en la actividad muscular entre trabajadores obesos y no obesos durante la elevación manual de cargas.
Received: December 01 rd Received in revised form: February 02 nd Accepted: March 09 th Abstract The prevalence of obesity is increasing throughout the workforce. Manual lifting tasks are common and can produce significant muscle loading.
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This study compared muscular activity between obese and non-obese subjects, using surface Electromyography EMGduring manual lifting. Six different lifting tasks with 5, 10 and 15 kg loads in free and constrained styles were performed by 14 participants with different obesity levels.
Muscle Activation Times AT before each task were also evaluated. These findings reinforce the need to develop further studies focused on obesity as a risk factor for the development of musculoskeletal disorders.While it's good to embrace our differences, staying healthy is important for everyone. One key indicator of health is your body fat percentage. The first step in. Body Fat Percentage in Colombian Adults with Overweight or Obesity. a convenient tool for assessing body fat percentage (BF%) in a sample of t-test showed a significant mean difference in BF% between the methods. BMI is also uninformative with regard to body fat distribution. waist-to-hip ratio (WHR; WC/HC), height (cm) and body fat percentage (BF%). patterns in both sexes and no statistical differences between the effect estimates. Differences in %BF between underweight, normal weight and overweight children from Comparison of Body Mass Index (BMI) and fat percentage criteria. Mean Percent Body Fat (PBF) for males and females by age group. This resulted in no significant differences in BMI between. middle-aged. Dieta alimenticia para subir masa muscular Keto 101: qué es, cómo funciona y cómo comenzar Menú de dieta Keto, plan de alimentación de dieta cetogénica, plan de dieta Keto ketogenic diet medical news today ¿Comer carbohidratos me enfermará de keto? - Ventaja Comidas Dieta Keto Sample menu for diabetes type 2. Que es el examen de sarro ungueal. Cepillado dental bebes. Temperatura normal en adultos mayores de 70 años. Picazon y ronchas en las manos y piernas. Vitamina para aumentar de masa muscular. Eliminar cartucheras muslos. Como combinar alimentos para perder peso. Dolor de ovarios dos semanas antes del periodo. Como curar heridas en la boca. Menu para bajar el colesterol y los triglicéridos. Sintomas de hipoglucemia en perros diabeticos. Desayuno ideal para un ciclista. Siento mis latidos en la cabeza. Como quitar la tos con flemas a un niño de 1 año. Que musculos se trabajan en las barras paralelas. Linfoma en niños sintomas y tratamiento. Dolor abdominal diarrea gases y nauseas. Como hacer para quererme a mi misma. Como hacer un osito de goma gigante.
Keywords : obesity; manual lifting; surface electromyography; maximum contraction during task; muscle activation time. Las tareas de elevación manual son comunes y pueden producir una significativa carga muscular.
El actual estudio comparó la actividad muscular entre sujetos obesos y no obesos, mediante la aplicación de electromiografía de superficie EMG durante la elevación manual de cargas. Seis tareas de elevación muy diversas con cargas de 5, 10 y 15 kg y con estilos de elevación libre y restringido fueran solicitadas a los 14 sujetos con diferentes niveles de obesidad.
Estos resultados refuerzan la necesidad de desarrollar nuevos estudios, los cuales se deben centrar en la obesidad como un factor de riesgo para la aparición de síntomas y trastornos musculoesqueléticos.
Effects of obesity on work performance.
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Improved social conditions among the population have led to an increase in the incidence of obesity in several countries, principally in the industrialized world. Global statistics confirm that obesity has more than doubled since and that, currently, more than 1.
Obese subjects therefore represent a growing fraction of the workforce .
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Obesity can be associated with psychological, social and physical problems, including Work-related Musculoskeletal Disorders WRMSDswhich can negatively affect productivity [3,4]. Additionally, overweight subjects are absent from work due to illness more frequently and for longer periods than the non-obese .
Specific studies have analyzed different activities of daily life, comparing obese with non-obese subjects. Biomechanical studies of human walking have demonstrated that body fat mass BFM affects this activity .
For example, obese subjects reveal higher ground reaction forces , altered knee joint kinematics  and higher metabolic rates, even though the explanation for this last aspect has not been clearly established .
These postures can be affected by excessive BFM.
However, the effects of obesity on posture maintenance during occupational tasks are rarely investigated . Postural analysis tools, frequently used in workplace ergonomic interventions, seem to consider only people with normal weight.
Based on this assumption, Park et al. In this study, the obese group reported higher perceived overload in all the postures considered, demonstrating that obesity increases postural stress. The findings of another study , also showed that the trunk posture of obese subjects was more flexed and that they experienced increased hip joint moment and greater hip-to-bench distance during a simulated standing work task.
Furthermore, it has also been demonstrated that obese subjects have more problems with work-restricting musculoskeletal pain than subjects of normal weight . From the biomechanical point of view, excessive body mass can negatively affect the behavior of muscles and spine during the performance of physical activities.
Different studies have correlated obesity with impairments to muscle activity, such as decreased muscle strength [7,15,16], as well as with lower back pain [17,18], although the epidemiological research literature has still not demonstrated a clear link between obesity and the latter phenomenon .
It is important to emphasize that lower back pain and its associated disorders continue to be the most common musculoskeletal problem in the workplace.
It is associated with high costs to industry and can difference between body fat percentage and bmi influence the quality of life of workers.
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However, such activities are very common in a wide variety of industrial workplaces ; they can have a range of additional occupational and individual WRMSD risk factors associated with them too. One of these individual risk factors is individual body composition, including excessive BFM . In this context, Singh et al.
However, these authors pointed out that this area requires further study, using other kinds of data, such as biomechanical information. Consequently, Xu et al.
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However, obese subjects in fact registered higher values for kinematic trunk variables than their normal weight counterparts. As mentioned above, although obesity has been intensively studied in recent years, research findings remain somewhat controversial.
For example, the effect of excessive BFM on the function of the locomotor system is not yet well understood . In addition, ergonomic studies are required to provide a more complete understanding of the effects of obesity on work performance , including during manual lifting tasks.
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Assessment of obesity. Currently, obesity is assessed using different techniques, but each has several potential limitations and they should therefore be applied with caution.
It should be noted that in previous research into the effects of obesity on work performance, BMI has been the principal indicator used for obesity assessment. BMI is only based on a subject's weight and height; it does not distinguish fat-free body mass and fat mass, as it does not characterize body fat mass distribution .
BMI is an anthropometric measure commonly applied in epidemiological studies. However its specificity and predictive ability in identification of health problems associated with obesity have been questioned.
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BMI is considered to be a fallible measure for a detailed assessment of body composition and, therefore, should not be used to classify the individual level of obesity , implying the need to use more appropriate and comprehensive obesity assessment techniques. For these reasons, in this study obesity levels were categorized according to subjects' BFM, determined by bioelectrical impedance analysis BIA.
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This body composition assessment technique is easy to apply, non-invasive, relatively inexpensive and portable . BIA allows for the quantification of body impedance by connecting electrodes to different areas of the body in order to create a circuit through which a current can pass.
As the different human tissues exhibit different resistances to the passage of electric current, BIA devices determine the amount of lean body mass and body water as well as fat. Thus, the BFM can be obtained by calculating the difference between weight and lean body mass in individuals .
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These results are obtained by way of predictive analytical expressions adjusted to individual factors such as gender, age, height and level of physical activity. These equations which vary according to the equipment used must be validated for the population in question, including obese individuals .
Muscular activity analysis during manual lifting.Hong Kong Journal of Paediatrics [HK J Paediatr (New Series) ;]
Obesity has been associated with impaired muscle function and reduced muscle strength [7,15,16]. Concerning occupational contexts, one of the key elements in WRMSD prevention is understanding the muscular demands of commonly performed tasks , such as manual lifting.
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In this field, surface EMG has been widely used in ergonomic studies focused on various risk factors for MSDs, in an effort to optimize lifting tasks and so reduce the risk of such disorders developing .
In order to analyze muscular activity for each obesity level, surface EMG data was collected, as the principal role of the technique is the objective evaluation of muscle activity associated with particular manual work tasks difference between body fat percentage and bmi.
The main purpose of the current study was to examine possible differences between the muscular contraction and activation times of obese and non-obese subjects during manual lifting. The intention was also to study some task conditions different load weights and postural restraints that might produce variations in muscular responses for the obese subjects.
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Materials and Method. Subjects and experimental trials. Ten healthy males and four women, with no history of musculoskeletal disorders, volunteered to participate in the study.
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After signing an informed consent form, different anthropometric measures weight, stature, shoulder height, WC were collected. This equipment measures the BFM percentage based on electric resistance determined by BIA and also integrates personal data, such as the height, weight, age and gender of participants, in order to accurately define individual obesity levels .
The personal data used in the obesity level definition are presented in Table 1. In the sagittal plane, 6 symmetrical trials 3 loads x 2 styles of lifting and replacing a test box with goods handles, and with loads of 5 kg, 10 kg and 15 kg respectively, were performed in constrained and in free conditions Table 2.
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During constrained lifting, the box was placed behind a 60 cm high barrier simulating one side of an industrial bin. The box loads complied with the recommended limits defined by Portuguese national legislation  and in some of the guidelines published by the National Institute Occupational Safety and Health NIOSH . During the trials, participants stood in front of a height platform adjusted to each subject's standing knee height.
They used both hands to lift the box vertically up to shoulder height and to return it to its original position in a single slow movement. In order to simulate a realistic working situation, no specific foot-placing instructions were given.Differences in muscular activity between obese and non-obese workers during manual lifting
The movement was subdivided into 4 phases: standing up rest positionreaching represented in Fig. However, the data analyzed in this paper relates only to the lifting phase. EMG data collection.
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- Differences in muscular activity between obese and non-obese workers during manual lifting. Diferencias en la actividad muscular entre trabajadores obesos y no obesos durante la elevación manual de cargas.
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EMG activity was collected using bipolar surface electrodes with 1 cm diameter and an inter-electrode distance of 2 cm. The EMG electrodes were affixed to the subject's body using standard placement procedures for Surface Electromyography for the Non-Invasive Assessment of Muscles  The zones of electrode placement were shaved, abraded and cleansed with rubbing alcohol absorbed into cotton rounds to lower the skin's electrical impedance .
Muscle selection was based on their functionality during this type of task. The Erector spinae muscles are spine extensors, significantly recruited during vertical handling tasks .
The Deltoideus Anterior muscle acts during arm abduction, assists arm flexion, extension and rotation, and is also responsible for shoulder joint stability . In addition, it was observed that fat mass accumulation was not high in these zones of the selected muscles, which, had it been, might have compromised EMG signal acquisition.
At least one neutral reference ground electrode was fixed on the elbow per subject.
EMG signal processing. AcqKnowledge 3. The raw EMG signals were amplified, high-pass filtered at 20 Hz and low-pass filtered at Hz, rectified, and smoothed.
The digital smoothing algorithm used was the root mean square RMSwhich reflects the mean power of difference between body fat percentage and bmi EMG signal  for each muscle and for each phase of the experimental trials. EMG data were normalized to peak value during each lifting trial, according to the following expression 1. This normalization procedure has been utilized in other EMG studies with subjects presenting restrictions in their ability to perform maximum voluntary contractions, such as sufferers of musculoskeletal pathologies or obesity .Body Mass Index and Volume of Fat Tissue of Unemployed Men in the Tuzla Canton
In addition, before each lifting trial, muscle Difference between body fat percentage and bmi was evaluated. This muscle onset quantification was based on a threshold defined by multiple SD of EMG-baseline noise . In this experimental design, the independent variables were the different box loads, lifting style and obesity level. Statistical analysis.
For each task condition, the mean MCT percentages were compared across the subjects belonging to different obesity levels, in order to test the following hypothesis: greater mean MCT percentages are observed in individuals with higher BFM percentages.Correlation between percentage of body fat measured by the Slaughter The percentile or Z-score of the body mass index is widely used in children and well with body fatness,8,12 although ethnic-related differences in the ability to. tion with sex, body mass index (BMI) and gait speed. (r=, p<), fat percentage (r=, p<) and Also, there are significant differences in the. There was no statistically significant difference in exercise minutes between The relationship between physical activity and body fat or weight is derived Table 2: Percentage of participants according to BMI and exercise recommendations. The relationship be- tween percentage body fat (%BF) and cardiovascular subjects and com- pared these findings with the relationship between BMI/ where indicated. T-tests were used to determine differences between men and women. The assessment of body fat percentage (BF%) in athletic populations is important in Furthermore, BMI is not useful to differentiate between fat compartments. Quantas calorias devo gastar para perder 1kg 1 Programa Keto durante la lactancia materna - Julie Scholten Coaching nunez cabeza de vaca facts Keto Ultra Diet Shark Tank - ¡Aumenta tu nivel de Sertonin! - Hogar. La mejor app para adelgazar gratis. Primer mes de embarazo panza dura. Dieta 1200 calorias diarias mujer. Es bueno comer manzanas en el desayuno. Aderezo de yogurt con aguacate. Recommended weight loss rate. Que tomar para la migrana. Eat to lose weight and gain muscle. Como se llama cuando quieres orinar y no puedes. Partido de voley argentina hoy. Medicamentos para los hongos en la boca. Como engordar mas rapido el ganado. Para que es saludable el kiwi. Herpes en el barriga. Precio de vacuna fiebre amarilla chile. Remedio para quitar cicatrices rapido. La mejor forma para depilarse el pubis. Porque me sale tanto acne en la cara. Como tomar el omega 3 para adelgazar. La zumba ayuda adelgazar.