When we relax, the flow of blood increases around our body giving us more energy. ... Relaxation slows our heart rate, reduces our blood pressure and relieves tension. It also aids digestion as we absorb essential nutrients more efficiently when relaxed, which helps to fight off disease and infection.When we relax, the flow of blood increases around our body giving us more energy. ... Relaxation slows our heart rate, reduces our blood pressure and relieves tension. It also aids digestion as we absorb essential nutrients more efficiently when relaxed, which helps to fight off disease and infection.