Description in some cases, weight gain can also occur as a result of developing tumors or other abnormal growths. Muscle weight gain can occur as a result of 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. Overweight is 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: exercise regimen, amount of water intake, amount of salt fat or sugar 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 3 days to two weeks after ingestion. being overweight 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. symptoms a noticeably larger stomach increase in body fat percentage increase in muscle mass increase in body hydration levels increase in breast size 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 and/or becoming physically inactive. 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. impact 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), aproinflammatory state and an increased tendency to thrombosis (prothrombotic state). social perspective though excess weight has been traditionally seen in contemporary society as "unacceptable", it is becoming more socially acceptable as more and more people become overweight and obese. obesity among women residing in the u. S. has become more socially acceptable, likely in part because more than one-third of women ages 20 and older are obese, according to a study published in the july issue of economic inquiry, the washington timesreports.