The most common cause of vascular obstruction is a blood clot, also known as a DVT. This type of vascular problem usually occurs in one leg (not both), and leads to swelling of the soft tissues throughout the foot and ankle. The swelling can also extend further up the leg.
The hypothalamus is a part of your brain that controls body temperature. When you exercise, your body temperature increases, causing the hypothalamus to signal the brainstem to further increase your heart rate.
Describe how sympathetic and parasympathetic nervous systems work together to regulate heart rate. They both send the heart nerve impulses. Though the parasympathetic system does not directly change the force of contraction when decreasing heart rate. The sympathetic system increases heart rate.