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Malnutrition occurs when an organism gets too few or too many nutrients, resulting in health problems. [11] [12] Specifically, it is a deficiency, excess, or imbalance of energy, protein and other nutrients which adversely affects the body's tissues and form.
Physical inactivity of children has also shown to be a serious cause, and children who fail to engage in regular physical activity are at greater risk of obesity. Researchers studied the physical activity of 133 children over a three-week period using an accelerometer to measure each child's level of physical activity. They discovered the obese ...
Physical activity in children may not be a significant contributor. [132] In both children and adults, there is an association between television viewing time and the risk of obesity. [133] [134] [135] Increased media exposure increases the rate of childhood obesity, with rates increasing proportionally to time spent watching television. [136]
Avoidant/restrictive food intake disorder is not simply "picky eating" commonly seen in toddlers and young children, which usually resolves on its own. [2]In ARFID, the behaviors are so severe that they lead to nutritional deficiencies, poor weight gain (or significant weight loss), and/or significant interference with "psychosocial functioning."
Etymologically, anorexia is a term of Greek origin: an-(ἀν-, prefix denoting negation) and orexis (ὄρεξις, "appetite"), translating literally to "a loss of appetite". In and of itself, this term does not have a harmful connotation, e.g., exercise-induced anorexia simply means that hunger is naturally suppressed during and after ...
Older people may feel less violent stomach contractions when they get hungry, but still suffer the secondary effects resulting from low food intake: these include weakness, irritability and decreased concentration. Prolonged lack of adequate nutrition also causes increased susceptibility to disease and reduced ability for the body to heal. [7] [8]
Failure to thrive (FTT), also known as weight faltering or faltering growth, indicates insufficient weight gain or absence of appropriate physical growth in children. [2] [3] FTT is usually defined in terms of weight, and can be evaluated either by a low weight for the child's age, or by a low rate of increase in the weight.
Poor appetite can have numerous causes, but may be a result of physical (infectious, autoimmune or malignant disease) or psychological (stress, mental disorders) factors. Likewise, hyperphagia (excessive eating) may be a result of hormonal imbalances, mental disorders (e.g., depression) and others.