Yes, sitting for long periods of time is detrimental to health. The human body evolved when homo sapiens were active organisms. Sitting causes one to lose muscle definition and gain back problems. Additionally, time that is spent sitting is not spent pursuing areas that would improve ones health and general well-being.
It is also bad for your back if you do not have good posture. They say people who sit down for more than 6 hours a day cut about 5 years off of their life, even if they exercise regularly It all has to do with gravity and when you are standing your blood flows much better.
Yes, sitting in a stationary position is bad for human health because it means that very few calories are being used during the course of a day. The calorie count needed to support a sedentary lifestyle is very low. However, most humans do not adjust their calorie intake based on their activity level. As a result, the calories are not used and the waistlines expand. The sedentary lifestyle that involves sitting at a desk or in a car for the majority of the day is the primary cause of the rampant obesity rates, especially in the United States.
This country promotes exercise and getting outside everyday for a reason, and a very good reason at that.Getting exercise is excellent for human health, and the opposite can only be bad for you especially when you combine it with poor food choices and the lack of productivity that inside activities provide.
I personally think that studies show that when you adhere to an exercise regimen, you can improve your cardiovascular health, lower blood pressure and improve metabolism and levels of cholesterol and triglycerides. You can reduce diabetes risk and the risk of certain cancers. And, finally, exercise can help you maintain a healthy weight, which can boost all of these benefits even more.