Discussion: Regular exercise is of paramount importance to maintaining our health, far beyond maintaining a healthy weight.

Exercise, not necessarily intense, is essential for the proper flow of lymph fluid, which is the immune system's second line of defense.
Regular exercise improves aerobic capacity and cardiovascular and lung output. The result is usually a decrease in heartbeats and an improvement in blood pressure levels.
The skeleton and joints must move and resist to maintain the joints' flexibility. Without movement, inflammatory processes damage the joints.
Moderate walking, especially after eating, improves digestion.
Exercise, especially outdoors, in the open air, improves mood and concentration.