The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The diseases that are associated with a sedentary lifestyle, and the major risk factors for these diseases are the following.
Experts in the field of human health have concluded that the diseases associated with a sedentary lifestyle are obesity(the most common disease), diabetes type 2, cardiovascular disease, depression, some mental issues, osteoporosis, colon cancer, anxiety, high blood pressure, and early death.
That is why it is so important to start a basic but permanent physical activity that helps us prevent those diseases. It could be a simple daily routine to walk in the park, 20 to 30 minutes.
We can go to the gym and ask the fitness instructor for a light routine that involves all the parts of our body. The key here is to be consistent.
And of course, the other 50% of the puzzle, good and balanced nutrition with proper rest.