Weight gain

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Weight gain is an increase in body weight. This can be either an increase in muscle mass, fat deposits, or excess fluids such as water.

Description

Muscle gain or weight gain can occur as a result of exercise or bodybuilding, in which muscle size is increased through strength training.

If enough weight is gained by way of increased body fat deposits, one may become overweight or fat, generally defined as having more body fat (adipose tissue) than is optimally healthy.

Weight gain has a latency period. The effect that eating has on weight gain can vary greatly depending on the following factors: energy (calorie) density of foods, exercise regimen, amount of water intake, amount of salt contained in the food, time of day eaten, age of individual, individual's country of origin, individual's overall stress level, and amount of water retention in ankles/feet. Typical latency periods vary from three days to two weeks after ingestion.

Being fat is a common condition, especially where food supplies are plentiful and lifestyles are sedentary. As much as 64% of the United States adult population is considered either overweight or obese, and this percentage has increased over the last four decades.

Gaining weight can cause the following effects, dependent on the variable listed above, but are generally limited to:

• Increase in body fat percentage
• Increase in muscle mass
• Increase in body hydration levels
• Increase in breast size

In more extreme cases:

• A noticeably larger stomach
• The abdomen will bulge outward and upward, creating a distended midsection

Causes

In regards to adipose tissue increases, a person generally gains fat-related weight by increasing food consumption, becoming physically inactive, or both. When energy intake exceeds energy expenditure (when the body is in positive energy balance), the body can store the excess energy in a dense, high-energy form as fat. One pound of fat represents 3500 calories, so over time, excessive energy intake and/or lack of exercise can contribute to fat gain and obesity. A study, involving more than 12,000 people tracked over 32 years, found that social networks play a surprisingly powerful role in determining an individual's chances of gaining weight, transmitting an increased risk of becoming obese from wives to husbands, from brothers to brothers and from friends to friends.

Weight gain is a common side-effect of psychiatric medication.

Effects

Excess adipose tissue on a human can lead to medical problems; however, a round or large figure does not of itself imply a medical problem, and is sometimes not primarily caused by adipose tissue. If too much weight is gained, serious health side-effects may follow. A large number of medical conditions have been associated with obesity. Health consequences are categorised as being the result of either increased fat mass (osteoarthritis, obstructive sleep apnea, social stigma) or increased number of fat cells (diabetes, some forms of cancer, cardiovascular disease, non-alcoholic fatty liver disease). There are alterations in the body's response to insulin (insulin resistance), a proinflammatory state and an increased tendency to thrombosis (prothrombotic state).

Social perspective

In centuries past, a degree of plumpness has been seen as indicative of personal or family prosperity: "Calories were scarce, physical labor was hard, and most people were as lean as greyhounds." In particular, a married woman who was thin was pitied, as her shape showed that her husband could not afford to feed her properly; conversely, having a fat wife was a status symbol: there was plenty to eat, and she did not need to work hard. Only in the early 20th Century did fatness lose this appeal. The connection of fatness with financial well-being persists today in some less-developed countries. Indeed, it may be on the rise.

Despite the connotations that excess weight had in the past, it has for some time been seen as "unacceptable", in contemporary Western society. An expansive market has taken root since the mid-20th century, focusing on weight loss regimens, products and surgeries. This market has been aided by the rising number of overweight and obese citizens in the United States. Data from the CDC's National Health and Nutrition Examination Survey, indicates that the average weight of women between ages 30 and 60 has increased by 20 pounds, or 14%, since 1976. Among women who weigh 300 pounds or more, the increase was 18%.

However, some research has indicated a more positive pattern. It has been suggested that obesity among women residing in the U.S. has become more socially acceptable. According to a study published in the July issue of Economic Inquiry, this is likely because more than one-third of women ages 20 and older are obese in the United States. The study found that the average woman weighed 147 pounds in 1994, but stated that she wanted to weigh 132 pounds. By 2002, the average women weighed 153 pounds, but said that she wanted to weight 135 pounds. "The fact that even the desired weight of women has increased suggests there is less social pressure to lose weight," the researchers noted. However, the difference between women's average weight and desired weight had increased as well, putting their conclusions into question.

In any case, weight gain and weight loss are still charged topics. The ever-present social stigma concerning weight gain, can have lasting and harmful effects on individuals, especially among young women. These are thought to include eating disorders and body dysmorphia.

In sports

Weight gain is seen in professional sports most notably in combat sports because of their weight divisions. It occurs mostly in boxing, mixed martial arts, puroresu and professional wrestling.

See also

• Healthy diet
• Fad diet
• Fat feminism
• Fat acceptance movement
• Weight stigma