Heart: Immobility will result in increased in cardiac workload for the heart because the heart will do more work when you are resting due to less resistance that is offered by the blood vessels. Due to the way the blood is distributed in the immobile person the cardiac output, heart rate and the stroke volume increases.
It is important to note that immobility predisposes the immobile person to thrombi formation due to venous stasis this is especially the legs where normal muscular activity will help to move blood towards the central circulatory system. Increase rate in the coagulation of blood can also cause thrombi formation. During the period of immobility calcium will leave the bones and enters the blood in the blood it will have an influence on the coagulation.
2.Orthostatic hypotension. Weakness and fainting might occur. Decrease in neuromuscular reflexes which will cause vasoconstriction and a loss to muscle tone.There is blood pool and there will be no circulation from the lower extremity.