"Stress responses help your body adjust to new situations. Stress can be positive, keeping us alert, motivated and ready to avoid danger. For example, if you have an important test coming up, a stress response might help your body work harder and stay awake longer. But stress becomes a problem when stressors continue without relief or periods of relaxation." All of these side effect of stress CAN be very dangerous to drivers when reoccurring.
Relationships that are positive can affect your physical/emotional health. it can affect your physical health by giving you some type of feeling that would lead to your emotional feelings/emotions. i hope that i helped you.