|
Exercise Paradox
The exercise paradox, also known as the workout paradox, refers to the finding that physical activity, while essential for maintaining overall health, does not necessarily lead to significant weight loss or increased calorie expenditure. This paradox challenges the common belief that more exercise equates to more calories burned and consequently, more weight loss. Hadza tribe case study The exercise paradox emerged from studies comparing calorie expenditure between different populations. Fieldwork on the Hadza people, a hunter-gatherer tribe in Tanzania, revealed that despite their high levels of physical activity, the tribe burned a similar number of calories per day as sedentary individuals in industrialized societies. This finding, led by Duke University professor Herman Pontzer, contradicted the expectation that more active lifestyles would result in higher energy expenditures. In 2012, Pontzer and his team of researchers analyzed energy expenditure in 30 Hadza adults u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Activity
Physical activity is defined as any voluntary movement produced by skeletal muscles that requires energy expenditure.Global Recommendations on Physical Activity for Health, 2009. World Health Organization. Geneva, Switzerland. Accessed 13/07/2018. Available at: http://www.who.int/ncds/prevention/physical-activity/en/ Physical activity encompasses all activities, at any intensity, performed during any time of day or night. It includes both voluntary exercise and incidental activity integrated into the daily routine. This integrated activity may not be planned, structured, repetitive or purposeful for the improvement of physical fitness, and may include activities such as walking to the local shop, cleaning, working, active transport etc. Lack of physical activity is associated with a range of negative health outcomes, whereas increased physical activity can improve physical and mental health, as well as cognitive and cardiovascular health. There are at least eight investments that w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Error
The standard error (SE) of a statistic (usually an estimator of a parameter, like the average or mean) is the standard deviation of its sampling distribution or an estimate of that standard deviation. In other words, it is the standard deviation of statistic values (each value is per sample that is a set of observations made per sampling on the same population). If the statistic is the sample mean, it is called the standard error of the mean (SEM). The standard error is a key ingredient in producing confidence intervals. The sampling distribution of a mean is generated by repeated sampling from the same population and recording the sample mean per sample. This forms a distribution of different means, and this distribution has its own mean and variance. Mathematically, the variance of the sampling mean distribution obtained is equal to the variance of the population divided by the sample size. This is because as the sample size increases, sample means cluster more closely arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Set Point Theory
Set point theory, as it pertains to human body weight, states that there is a biological control method in humans that actively regulates weight towards a predetermined set weight for each individual. This may occur through regulation of energy intake (e.g. via increased or decreased appetite) or energy expenditure (e.g. via reduced metabolism or feelings of lethargy). Set point theory explains why it is difficult for dieters to maintain weight loss over time, as calorie restriction may become less effective or more difficult to maintain as regulatory mechanisms in the body actively push the body back towards the set point weight. Set point theory differentiates between active compensation and passive compensation. Passive compensation describes processes where a decrease in body fat leads to less energy being expended, because one carries around less weight in daily activities. In addition to passive compensation, set point theory also posits active compensation. Here additional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plateau Effect
The plateau effect is a phenomenon that lessens the effectiveness of once effective measures over time. An example of the plateau effect is when someone's exercise fails to be as effective as in the past, similar to the concept of diminishing returns. A person enters into a period where there is no improvement or a decrease in performance. Overview The plateau effect may appear in learning, when students experience a dwindling (less steady) benefit from their learning effort. Studies of elementary school students have found there is a plateau effect in reading level during the upper elementary years. This effect is shown in the forgetting curve developed by Hermann Ebbinghaus, who established the hypothesis of the exponential nature of forgetting. Ebbinghaus hypothesized that the use of the ancient mnemonic device, Method of Loci, and spaced repetition can help overcome the plateau effect. The plateau effect is also experienced in acclimation, which is the process that allows org ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benefits Of Physical Activity
The benefits of physical activity range widely. Most types of physical activity improve health and well-being. Physical activity refers to any bodily movement that expends energy through the use of skeletal muscles. A subset of physical activity, Exercise, is defined as planned, structured, and repetitive movement intended to improve or maintain physical fitness and overall health.wide range of health benefits is associated with physical activity, making it a key factor in the prevention and management of various health conditions. Regular physical activity has been shown to help prevent or delay chronic illnesses such as cardiovascular disease, Type 2 diabetes, certain cancers, stroke, and hypertension. It is also associated with improved mental health outcomes, including reduced symptoms of Depression and anxiety. Recommended amount Two and a half hours of moderate-intensity exercise per week is recommended for reducing the risk of health issues. However, even doing a smal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epidemiology Of Obesity
Obesity has been observed throughout human history. Many early depictions of the human form in art and sculpture appear obese. However, it was not until the 20th century that obesity became common — so much so that, in 1997, the World Health Organization (WHO) formally recognized obesity as a global epidemic and estimated that the worldwide prevalence of obesity has nearly tripled since 1975. Obesity is defined as having a body mass index (BMI) greater than or equal to 30 kg/m2, and in June 2013 the American Medical Association classified it as a disease. In countries of the Organisation for Economic Co-operation and Development (OECD), one child out of five is overweight or obese. Once considered a problem only of World Bank high-income economy, high-income countries, obesity rates are rising worldwide. In 2014, the mean BMI in 128 countries was above the threshold for overweight. Globally, there are now more people who are obese than who are underweight, a trend obser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Countries Of Europe
The list below includes all entities falling even partially under any of the various common definitions of Europe, geographical or political. Fifty generally recognised sovereign states, Kosovo with limited, but substantial, international recognition, and four largely unrecognised ''de facto'' states with limited to no recognition have territory in Europe and/or membership in international European organisations. There are eight entities that are not integral parts of a European state or have special political arrangements. Boundary of Europe Geographical Under the commonly used geographic definition, the boundary between the continents of Asia and Europe stretches along the Ural Mountains, the Ural River, and the Caspian Sea in the east, the Greater Caucasus range, and the Black Sea with its outlets, the Bosporus and the Dardanelles, in the south. Based on such a commonly used division of the continents, the transcontinental countries of Azerbaijan, Georgia, Kazakhstan, R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eswatini
Eswatini, formally the Kingdom of Eswatini, also known by its former official names Swaziland and the Kingdom of Swaziland, is a landlocked country in Southern Africa. It is bordered by South Africa on all sides except the northeast, where it shares a border with Mozambique. At no more than north to south and east to west, Eswatini is one of the smallest countries in Africa; despite this, its climate and topography are diverse, ranging from a cool and mountainous highveld to a hot and dry lowveld. The population is composed primarily of Swazi people, ethnic Swazis. The prevalent language is Swazi language, Swazi (''siSwati'' in native form). The Swazis established their kingdom in the mid-18th century under the leadership of Ngwane III. The country and the Swazi take their names from Mswati II, the 19th-century king under whose rule the country was expanded and unified; its boundaries were drawn up in 1881 in the midst of the Scramble for Africa. After the Second Boer War, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Development Index
The Human Development Index (HDI) is a statistical composite index of life expectancy, Education Index, education (mean years of schooling completed and expected years of schooling upon entering the education system), and per capita income indicators, which is used to rank countries into four tiers of Human development (humanity), human development. A country scores a higher level of HDI when the life expectancy at birth, lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher. It was developed by Pakistani economist Mahbub ul-Haq and was further used to measure a country's development by the United Nations Development Programme (UNDP)'s Human Development Report Office. The 2010 Human Development Report introduced an List of countries by inequality-adjusted Human Development Index, inequality-adjusted Human Development Index (IHDI). While the simple HDI remains useful, it stated that "the IHDI is the actual level of huma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meta-analysis
Meta-analysis is a method of synthesis of quantitative data from multiple independent studies addressing a common research question. An important part of this method involves computing a combined effect size across all of the studies. As such, this statistical approach involves extracting effect sizes and variance measures from various studies. By combining these effect sizes the statistical power is improved and can resolve uncertainties or discrepancies found in individual studies. Meta-analyses are integral in supporting research grant proposals, shaping treatment guidelines, and influencing health policies. They are also pivotal in summarizing existing research to guide future studies, thereby cementing their role as a fundamental methodology in metascience. Meta-analyses are often, but not always, important components of a systematic review. History The term "meta-analysis" was coined in 1976 by the statistician Gene V. Glass, Gene Glass, who stated ''"Meta-analysis refers t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weight Management
Weight management comprises behaviors, techniques, and Physiology, physiological processes that contribute to a person's ability to attain and maintain a healthy Human body weight, weight. Most weight management techniques encompass long-term lifestyle strategies that promote Healthy diet, healthy eating and daily physical activity. Weight management generally includes tracking weight over time and identifying an individual's ideal body weight. Weight management strategies most often focus on achieving healthy weights through slow but steady weight loss, followed by maintenance of an ideal body weight. However, weight neutral approaches to health have also been shown to result in positive health outcomes. Understanding the basic science of weight management and strategies for attaining and maintaining a healthy weight is important because obesity is a risk factor for development of many chronic diseases, like Type 2 diabetes, hypertension and cardiovascular disease. Key factor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calorie Restriction
Calorie restriction (CR, also known as caloric restriction or energy restriction) is a dietary regimen that reduces the energy intake from foods and beverages without incurring malnutrition. The possible effect of calorie restriction on body weight management, longevity, and aging-associated diseases has been an active area of research. Dietary guidelines Caloric intake control, and reduction for overweight individuals, is recommended by US dietary guidelines and science-based societies. Calorie restriction is recommended for people with diabetes and prediabetes, in combination with physical exercise and a weight loss goal of 5-15% for diabetes and 7-10% for prediabetes to prevent progression to diabetes. Mild calorie restriction may be beneficial for pregnant women to reduce weight gain (without weight loss) and reduce perinatal risks for both the mother and child. For overweight or obese individuals, calorie restriction may improve health through weight loss, althoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
