If we compare the life of our ancestors and ours today we will find numerous unhealthy and unnatural habits we developed following "advancements of the system", the globalizing world. The way we work and communicate. Long periods of sitting are linked to multiple health problems like obesity, high blood sugar, depression, stress, metabolic syndrome and so on.  About 65% of the global population spends 7 – 10 hours or more sitting before a computer every day. Americans spend more than 50% of their waking hours sedentary. Physical inactivity is now blamed for 5 million deaths a year in the US only.

A human body is designed to move regularly, so siting for longer periods is highly detrimental to the health but the effects develop gradually, it will not happen in a day.
So, what happens when we are sitting:

Or muscular electrical activity drops down
Our calorie burning/ consumption drops 65% compared to walking
After 2 weeks of siting 6 hours /day we experience increase of fatty molecules, bed cholesterol, insulin resistance, blood sugar increases, oxygen consumption drops, it is harder to walk and climb stairs, weight risk increased.

After one year of sitting for 6 hours /day we have developed higher cholesterol, obesity and bone mass reduced for 1%/year. If we sit for 10 to 20 years it takes 7 years of our life span, increase risk of cancer and death by a hearth disorder.

Here it is:

1.Sitting/inactivity causes Earlier Death

It is proven that physical inactivity for prolonged periods leads to many health problems. World Health Organization reports that physical inactivity or and sitting for longer periods in front of a computer is the fourth leading factor of death.

Sitting for more than 11 hours per day increased the chances of death by 40%. it is the major cause of about 25% of colon and breast cancers, 30% of heart cases, and 27% of diabetes cases.

2.Sitting for too long puts a lot of pressure on the spine causing Bad Back, Pain in the Shoulders and Neck, premature degeneration, resulting in chronic pain and firmness on the spine discs, decreased absorbance of nutrients and reduced blood circulation.

About 40% of the population have a bad back only because they sit before the computer for too long.

3. Depression, Stress, and Anxiety

Long sitting periods have serious mental effects in addition to affecting the physical health. Anxiety and depression are higher in individuals who spend most of their time sitting.

4. Weight Gain

When the body moves, your muscular activity help in processing the sugars and fats you eat. But, when you spend most of the time sitting the body then reaches a point where it can no longer accept the insulin stressing the pancreas and liver.

5. Weaker Legs

If you do not use muscles then you lose them, it is muscle atrophy or weakening of the muscles). If legs do not hold your body weight you are switching this job to your back so the body is more prone to injuries.

6.Gradual Loss of Memory Power

Even you might perform organizing tasks and solving big problems while using a computer your brain will gradualy become foggy within a few years.

Sitting reduces the oxygen and blood to the brain as well as mood - enhancing chemicals. So, the healthy brain functions slow down.

7. Fatal Cardiovascular Problems

Without movement the flow of blood becomes slower, and the muscles burn less fat. Accumulation of fatty acids can block the blood vessels and arteries leading to your heart. It leads to cardiovascular problems like heart attacks, strokes, and other.

8. Posture Problems

The more time one spends sitting, the more pressure goes to the vertebrae strains the shoulders, neck, and back, and increases the chances of disc hernia.

9. Varicose Veins

Due to inactivity blood gather in the legs, which leads to spider veins or varicose veins, over time it can cause a fatal condition like blood clot.

10. Digestion Issues

When you continue sitting after meal, the contents of the abdomen begin to compress and slows the digestion process. If it becomes regular habit creates the sluggish digestion that leads to cramping, heartburn, bloating, and constipation in the gastrointestinal tract.