Obesity is largely due to a very powerful built in weight control system that is very stubborn.

There are many causes of obesity. We have no control over most of them.

1. Eating Habits
2. Life style
3. Hormones
4. Psychological factors
5. Medications
6. Physical inactivity

Yoga is a group of physical, mental, and spiritual practices or disciplines which originated in ancient India. There is a broad variety of yoga schools, practices, and goals in Hinduism, Buddhism, and Jainism. Among the most well-known types of yoga are Hatha yoga and Rāja yoga.

The origins of yoga have been speculated to date back to pre-Vedic Indian traditions; it is mentioned in the Rigveda,but most likely developed around the sixth and fifth centuries BCE,in ancient India's ascetic and śramaṇa movements. The chronology of earliest texts describing yoga-practices is unclear, varyingly credited to Hindu Upanishads.The Yoga Sutras of Patanjali date from the first half of the 1st millennium CE,but only gained prominence in the West in the 20th century. Hatha yoga texts emerged around the 11th century with origins in tantra.

Yoga gurus from India later introduced yoga to the west,following the success of Swami Vivekananda in the late 19th and early 20th century.In the 1980s, yoga became popular as a system of physical exercise across the Western world.Yoga in Indian traditions, however, is more than physical exercise; it has a meditative and spiritual core. One of the six major orthodox schools of Hinduism is also called Yoga, which has its own epistemology and metaphysics, and is closely related to Hindu Samkhya philosophy.

Many studies have tried to determine the effectiveness of yoga as a complementary intervention for cancer, schizophrenia, asthma, and heart disease.The results of these studies have been mixed and inconclusive, with cancer studies suggesting none to unclear effectiveness, and others suggesting yoga may reduce risk factors and aid in a patient's psychological healing process. On December 1, 2016, yoga was listed by UNESCO as an Intangible cultural heritage.

Anatomy

Anatomy is a natural science dealing with the structural organization of all living things.

Physiology

Physiology is concerned with the principal organ systems, such as the musculoskeletal and nervous systems. However, when studying physiology, you will be looking at the functions of cells and organs within their biological systems, rather than their structures

Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, occupations and daily activities. Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest.

Some ergogenic aids are known to have harmful side effects and this is the reason why they are banned by sports governing authorities because they are unsafe and unethical. 

The most abused aids include the following:

• Anabolic steroids: These are synthetic hormones used to increase muscle mass and strength. They also produce a “steroid rush”, a state of euphoria and decreased fatigue that allows the athlete to train harder and longer. Many adverse effects have been documented from using these steroids
• Blood doping: This is another dangerous ergogenic aid. It involves taking blood or blood products such as erythropoietin (EPO), a hormone that stimulates the bones to make red blood cells, to an athlete to improve endurance and speed. It can also have harmful side effects
• Human growth hormone (HGH): HGH is a widely abused ergogenic aid by body builders