Accuracy and consistency of weights provided by home bathroom scales

Gledhill

British J Health Psychol

et al. 2016

Objectives: There has been a steady rise in obesity levels in Western countries and a contributory factor is people's failure to recognise weight gain. Two important visual perceptual biases, which have hitherto been ignored in the obesity literature, could contribute to this problem; contraction bias and Weber's law. Contraction bias predicts that the weight of obese bodies will be under-estimated and the degree of underestimation will increase as body mass index (BMI) increases. Weber's law predicts that change in the body size will become progressively harder to detect as their BMI increases. Methods:In Experiment 1, twenty-nine women participants estimated the weight of 120 women varying in their body mass. In Experiment 2, twenty-eight women participants judged which body was the heavier in a 2-alternative forced choice paradigm. Results:In Experiment 1, as predicted the participants showed a progressive underestimation of over-weight and obese bodies, β1 = 0.71, t = 26.96, p < .0001. For Experiment 2, there was a significant effect of the BMI of the bodies being judged on the just noticeable difference needed to discriminate between them: F(1,196) = 89.39, p < .0001 for 3D bodies and F(1,86.5) = 44.57, p < .0001 for digital photographs. Conclusions:Normal visual perceptual biases influence our ability to determine body size: contraction bias and Weber's law mean that as bodies become overweight and obese it is harder to judge their weight and detect any increase in size. These effects may therefore compromise people's ability to recognise weight gain and undertake compensatory weight control behaviours.

Section: Discussionmentioning

confidence: 99%

Visual biases in judging body weight

Gledhill

British J Health Psychol

et al. 2016

“…In addition, the bathroom weighing scale was reset to zero before each use. Yorkin et al (2013) have reported that a digital home bathroom weighing scale offers adequately precise and reliable weights for public health research. Prompt reset to zero scale before each use could promote precision of weight measurements (Yorkin et al 2013).…”

Section: Validity and Reliability Of The Instrumentmentioning

confidence: 99%

Relationship between Cardiorespiratory Fitness and Anthropometric Variables among School-going Adolescents in Nigeria

et al. 2017

The increase in physical activity (PA) levels has been known to be associated with improved cardiorespiratory fitness status which helps in reducing the risk factors of non-communicable disease. However, the interaction between cardiorespiratory fitness and anthropometric variables remains unclear and needs further investigation. This study assessed the relationship between cardiorespiratory fitness and anthropometric variables among school-going adolescents in Nigeria. Two hundred and fifty apparently healthy participants ranging from 12 to 20 years of age, who were randomly selected, participated in this study. Height, body weight, and body mass index (BMI) were measured. Cooper's 12 minutes run/walk test was conducted to assess cardiorespiratory fitness (estimated by maximal oxygen uptake: VO2max). There was a significant correlation betweenVO2max and BMI. In the regression model, weight, height, gender, and BMI accounted for ninety-five percent of the total variance in the participants' cardiorespiratory fitness. Body weight, height, gender, and BMI were significant predictors of cardiorespiratory fitness in the school-going Nigerian adolescents.

“…It has a validity and intra-rater reliability index of 0.9 and 0.95 respectively. 24 Height meter: This was used to measure the participants' height. It is normally made from a ruler and a horizontal headpiece that is sliding and can be adjusted to rest on the top of the head.…”

Section: Adapted Cable Tensiometer (Camry Emperors Model: Iso9001)mentioning

confidence: 99%

Relationship of quadriceps femoris muscle strength and endurance with selected anthropometric indices

Okwudili¹,

Onuorah²,

Agha³

et al. 2019

IPMRJ

Background: Muscle strength and endurance have been proven to be related with anthropometric indices. This index is believed to be among the determinant of success in exercise performance and plays an important role in matching athletes to appropriate sports. However, information on the relationship between quadriceps femoris muscle (QFM) strength and endurance with measures of anthropometry is scarce. This study evaluated the relationship between QFM strength and endurance with anthropometric indices. Methods: This descriptive observational study involved one hundred and three undergraduate students (81 males and 22 females) recruited by convenience sampling method. Body weight, height and body mass index (BMI) were measured using standardized procedures. QFM strength was measured using an adapted cable tensiometer. QFM endurance was measured in seconds using a handheld stop watch as the maximum time to maintain the maximum contraction of quadriceps femoris. Descriptive statistics was used to explore demographic data. Pearson's moment correlation coefficient was used to test the hypotheses. Alpha level was set at p <0.05. Results: The result showed that QFM strength had significant positive correlation with each of body weight and height, while there was no significant correlation with BMI. QFM endurance has significant negative correlation with each of body weight and BMI and a significant positive correlation with height. Conclusion: Sports medicine experts and team coaches should put into consideration individual's body weight, height and BMI during pre-participatory screening in placing prospective athletes to sports or sporting positions requiring repetitive use of QFM where they have a higher likelihood to excel.