Keep moderate jogging hustle. The point is that you don't feel uncomfortable or exhausted. Objectively, control the price control in "180 minus your age". For example, for the 60-year-old, the correct heart rate should be 180 - 60 = 120 times. The movement should last for no less than twenty min. Every week, there should be not less than 4 functions. For those who suffer from chroni