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.
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.O...
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Weight gain
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