There are some people who just can't a pound even if they go to the gym four times a week and watch what goes to their mouth.

Here are the common reasons why you can't say goodbye to those unwanted pounds.

• Not enough exercise, means you aren't burning enough calories. Increase calorie burn by being physically active during your regular activities. Climb stairs, walk while you talk on the phone, and stand while you fix your desk. Make sure you burn more calories than you take in.
• After a vigorous exercise make sure to drink plenty of water, because vigorous exercise may help increase your appetite, of course you don't want to eat like a pig after hours of burning those calories.
• Eating small portion of candy bars, chips and cookies while watching TV can start to add up and make you gain weight. Be aware of those small portion of foods that comes into your mouth

• Softdrinks, processed fruit juices. powdered iced-tea and juices, coffee with cream, syrup and alcoholic drinks contains a huge amount of calories You can unconsciously consume 300 to 500 extra calories a day with this liquid beverages
• Some anti-depressant, birth control pills, anti-allergy medicines and corticosteroid medications are known for causing weight gain. This may be due to a lowering of the metabolism and an increase in appetite and water retention. Tell this problem to your doctor so she can prescribe a different medicine.
• High sodium-diet can leave you bloated and it is also bad for your health. When we talk of sodium we are not only talking of table salt. Sodium is present in almost all processed foods, even those that don't taste salty or even sweet like ketchup.
• Even healthy foods when eaten in excess will cause gain weight. Oil-based dressings have 100-plus calories per tablespoons. It's not uncommon for salad eaters to use four to five tablespoons.

• Ordering a Super-sized portions can turn you into super-sized version of yourself always opt for the regular orders for your meal. Super sizing your meal can mean the difference between 120 calories and 600 calories.
• According to studies people who don't eat breakfast tend to eat more during the rest of the day. Sumo wrestlers traditionally don't eat breakfast because the hunger that ensues during lunch and dinner helps them gain weight.
• Consuming your food fast is another reason you can't lose weight. People who eat fast do eat a greater amount of food because they fool their brain-stomach appetite mechanism before it has a chance to kick in. Do the opposite by eating slowly if you want to lose weight.
• Some medical condition like diabetes, hypothyroidism may cause of weight gain.

If you have been gaining weight in spite of exercising regularly and watching your diet consult you doctor.