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Physical fitness is maintained by a range of physical activities. Physical activity is defined by the World Health Organization as "any bodily movement produced by skeletal muscles that requires energy expenditure." [1] Human factors and social influences are important in starting and maintaining such activities. Social environments can ...
The experience of eye strain when reading in dim light has given rise to the common misconception that such an activity causes permanent eye damage. [3] When concentrating on a visually intense task, such as continuously focusing on a book or computer monitor, the ciliary muscles and the extraocular muscles are strained. This causes discomfort ...
Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, occupations, and daily activities. Physical fitness is generally achieved through proper nutrition, [1] moderate-vigorous physical exercise, [2] and sufficient rest along with a formal recovery plan. [3]
The benefits of physical activity range widely. Most types of physical activity improve health and well-being. Physical activity refers to any body movement that burns calories. “Exercise,” a subcategory of physical activity, refers to planned, structured, and repetitive activities aimed at improving physical fitness and health. [1]
[50] [54] [55] Physical activity is associated with increased levels of IGF-1 in blood serum, which is known to contribute to neuroplasticity in the brain due to its capacity to cross the blood–brain barrier and blood–cerebrospinal fluid barrier; [5] [50] [53] [54] consequently, one review noted that IGF-1 is a key mediator of exercise ...
Researchers have long been interested in how an individual's level and types of social support impact the effect of stress on their health. Studies consistently show that social support can protect against physical and mental consequences of stress. [80] [81] This can occur through a variety of mechanisms. One model, known as the "direct ...
Those red eyes you get from swimming aren't caused by chlorine, according to an official with the Centers for Disease Control and Prevention. %shareLinks-quote="Chlorine binds with all the things ...
Friends, family, and community networks provide emotional support, practical assistance, and a sense of belonging, which buffer against stress and contribute to mental and physical well-being. Conversely, social isolation and lack of social support are linked to increased mortality rates and poorer health outcomes across various age groups.