The lungs also help the body to get rid of CO 2 gas when we breathe out. There are a number of other jobs carried out by the lungs that include: 1  Changing the pH of blood (whether the blood is more acid or alkali) by increasing or decreasing the amount of CO 2 in the body. 2  Filtering out small blood clots formed in veins.
Anxiety, however, is often the cause of jelly legs, especially severe anxiety. Take our free 7 minute anxiety test to score your anxiety severity and learn more about how to control your anxiety. Start the anxiety test here. When your legs feel like jelly, standing can feel unusual. It may be accompanied by dizziness or balance issues that are either related to the weakness in your legs, or the direct result of anxiety causing other symptoms and conditions.
Standing or sitting for hours at a time without getting up and walking around can cause blood to pool in your legs and feet. This isnât a serious condition, it happens only because you are not moving around. You might notice that your feet are swollen and legs feel stiff and heavy. Just walking around gets your blood flowing again and the problem is solved. A hot and humid day can also cause swelling of the legs and feet.