Obesity and overweight are defined as an accumulation of excess body fat .

Obesity is a condition in which the natural energy reserve, stored in the fatty tissue of humans.

Obesity Causes :

People gain weight when the body takes in more calories than it burns off. Those extra calories are stored as fat. The amount of weight gain that leads to obesity doesn't happen in a few weeks or months.

One of the most important factors in weight gain is a sedentary lifestyle. People are much less active today than they used to be, with TVs, computers, and video games filling their spare time. Cars dominate our lives, and fewer people walk or ride bikes to get somewhere. As lives become busier, there is less time to cook healthy meals, so more and more people eat at restaurants, grab takeout food, or buy quick foods at the grocery store or food market to heat up at home. All of these can contain lots more fat and calories than meals prepared from fresh foods at home.

Precautions & Suggestions :

The best way to avoid these health problems is to maintain a healthy weight. And the keys to healthy weight are regular exercise and good eating habits.
To stay active, try to exercise 30 to 60 minutes every day. Your exercise doesn't have to be hardcore, either. Walking, swimming, and stretching are all good ways to burn calories and help you stay fit.

Try these activities to get moving:

• Go outside for a walk.
• Take the stairs instead of the elevator.
• Walk or bike to places (such as class or the store) instead of driving.
• If you have to drive somewhere, park farther away than you need to and walk the extra distance.
• Tackle those household chores, such as vacuuming, washing the car, or cleaning the bathroom — they all burn calories.
• Alternate activities so you don't get bored: Try running, biking, skating — the possibilities are endless.
• Limit your time watching TV or playing video games; even reading a book burns more energy.
• Go dancing — it can burn more than 300 calories an hour!

Eating well doesn't mean dieting over and over again to lose a few pounds. Instead, try to make healthy choices every day:

• Soft drinks, fruit juices, and sports drinks are loaded with sugar; drink fat-free or low-fat milk or water instead.
• Eat at least five servings of fruit and vegetables a day.
• Avoid fast-food restaurants. If you can't, try to pick healthier choices like grilled chicken or salads, and stick to regular servings —   don't supersize!
• If you want a snack, try carrot sticks, a piece of fruit, or a piece of whole-grain toast instead of processed foods like chips and crackers, which can be loaded with fat and calories.
• Eat when you're hungry, not when you're bored or because you can't think of anything else to do.
• Eat a healthy breakfast every day.
• Don't eat meals or snacks while watching TV because you'll probably end up eating more than you intend to.
• Pay attention to the portion sizes of what you eat.

Health risks associated with obesity?

Obesity is not just a cosmetic consideration; it is a dire health dilemma directly harmful to one's health. In the United States, roughly 300,000 deaths per year are directly related to obesity, and more than 80% of these deaths are in patients with a BMI over 30.

Obesity also increases the risk of developing a number of chronic diseases including:
Insulin Resistance:

Insulin is necessary for the transport of blood glucose (sugar) into the cells of muscle and fat (which is then used for energy). By transporting glucose into cells, insulin keeps the blood glucose levels in the normal range. Insulin resistance (IR) is the condition whereby the effectiveness of insulin in transporting glucose (sugar) into cells is diminished. Fat cells are more insulin resistant than muscle cells; therefore, one important cause of IR is obesity. The pancreas initially responds to IR by producing more insulin. As long as the pancreas can produce enough insulin to overcome this resistance, blood glucose levels remain normal. This IR state (characterized by normal blood glucose levels and high insulin levels) can last years. Once the pancreas can no longer keep up with producing high levels of insulin, blood glucose levels begin to rise, resulting in type 2 diabetes, thus IR is a pre-diabetes condition. In fact scientists now believe that the atherosclerosis (hardening of the arteries) associated with diabetes likely develops during this IR period.
Type 2 (adult-onset) diabetes.
The risk of type 2 diabetes increases with the degree and duration of obesity. Type 2 diabetes is associated with central obesity; a person with central obesity has excess fat around his/her waist, so that the body is shaped like an apple.

High blood pressure (hypertension):

Hypertension is common among obese adults. A Norwegian study showed that weight gain tended to increase blood pressure in women more significantly than in men. The risk of developing high blood pressure is also higher in obese people who are apple shaped (central obesity) than in people who are pear shaped (fat distribution mainly in hips and thighs).

High cholesterol (hypercholesterolemia) Stroke (cerebrovascular accident or CVA) Heart attack:

The Nurses Health Study found that the risk of developing coronary artery disease increased 3 to 4 times in women who had a BMI greater than 29. A Finnish study showed that for every one kilogram (2.2 pounds) increase in body weight, the risk of death from coronary artery disease increased by one percent. In patients who have already had a heart attack, obesity is associated with an increased likelihood of a second heart attack.
Congestive heart failure
Gallstones
Gout and gouty arthritis
Osteoarthritis (degenerative arthritis) of the knees,
hips, and the lower back

Treatment Procedure :

Ayurveda & Homeopathy offers treatments for various aspects of obesity. Combination of these medicines can help you lose weight by improving digestion, elimination, and metabolism. But the medicines need to be individually prescribed, based on your own unique pattern of symptoms.
In this way, without going to gym, at home itself you can reduce your weight without any side effects by controlling your diet & taking these medicines .