Come on , you are left behind !   Wow , I can't catch my breath . You are running too fast , honey .   You just need more exercise .   Yes , but you need to slow down . This is jogging , not racing !   I don't care . I want to burn up my fat .   But running so fast is not good for people over forties .   Why ?   We are not as athletic as we were when young . Mild exercise is more suitable for us . 