Why are different exercises recommended for people with different blood types?

The exercise recommendations are focused on improving total systemic health, mainly the functioning of the organs, glands, immune and circulatory systems of the body; as opposed to building muscle tissue (which can be viewed as a pleasant side effect). What strenuous exercise does for type O, yoga does for type A, and aerobic exercise does for type B and AB. Exercise recommendations are made with a general bias toward a person with a sedentary lifestyle. The link between blood type, stress and exercise is discussed in Live Right 4 Your Type.