Lifelong physical activity is a potent means of reducing the risk of non-communicable diseases including cancer, cardiovascular disease, and other chronic inflammatory disorders.

Evidence also shows that a physically active lifestyle diminishes the risk of contracting a range of communicable diseases including viral and bacterial infections, implying that immune competency is enhanced by regular exercise bouts.

However, to this day, research practice, academic teaching, and even physical activity promotion and prescription continues to consider a prevailing myth that vigorous exercise can temporarily suppress immune function.