Sometimes the reason for the daily weight fluctuation is obvious. If you have eaten a lot of food that causes you to gain weight before going to bed, or if you have done a lot of training and movement to cause you to lose weight, you will experience weight fluctuations, but there are different reasons for weight fluctuations.
Endocrinologist Kathleen Wyne says a 5-pound weight change per day is typical for most people, and the number on the scale can even vary by as much as 20 pounds depending on your body size.
Here are the reasons for daily weight fluctuation:
High-salt foods can cause water retention. The extra water adds up to the pound on the scale. Some people are very sensitive to sodium and can retain more water, while others are less sensitive.
CARBOHYDRATES ADD THREE TO ONE
If you like bread, pasta, rice, and other starchy carbohydrates, the weight gain you see on the scale may be related to your carbohydrate intake. For every gram of carbohydrate you consume, your body retains about three grams of water to store its fuel source.
THE WEIGHT OF THE FOOD
Food intake, of course, will cause your weight to increase slightly as the food is processed by your body. The food you consume can range from a few grams to several kilograms per meal per day, and the water in the food also causes your weight to increase.
EFFECT OF BOTTOM MOVEMENTS
The normal physiological stool transit time is estimated to range from 40 to 60 hours, and the optimal complete intestinal transit time is between 24 and 48 hours.
You are likely to see some fluctuations in the scale due to bowel movements. How heavy is your poop? In one research study, researchers found that you can produce 125 to 170 grams of stool per day.
Normal bowel habits vary, but you won’t see large weight fluctuations from bowel movements alone.
EXERCISE LEVELS CAUSE DAILY WEIGHT CHANGE
Exercise can cause you to sweat and lose water weight. Exercise experts estimate that the average person loses about 1 to 1.5 liters of fluid per hour during exercise, especially during intense cardiovascular activity.
SOME MEDICATIONS AFFECT YOUR WEIGHT
Some medications can cause you to gain weight. Some increase your appetite, some can cause you to retain water, and according to the Obesity Action Coalition (OAC), “Some drugs can affect how your body absorbs and stores glucose, which can lead to a buildup of fat in the midsection of your body.”
Most women notice some bloating due to fluid retention just before and during their menstrual period. Studies have shown that fluid retention peaks on the first day of menstrual flow. It is lowest during the mid-follicular period (middle stage of your cycle) and then gradually increases over the eleven days surrounding ovulation.
ALCOHOL AFFECTS YOUR WEIGHT
Alcohol is a diuretic, so if you urinate more than usual while drinking, you may notice sudden weight loss. In fact, researchers have found that alcohol can create a stream of urine within 20 minutes of consumption, which can lead to urinary fluid losses and possible fluid imbalance.
But beware! This imbalance can also cause your body to retain fluid from the drinks you consume and the foods you eat.