Various methods of concentration, reflection, or focusing of thoughts that reduce activity of the sympathetic nervous system are

The methods of concentration, reflection, or focusing of thoughts that reduce activity of the sympathetic nervous system are typically referred to as relaxation techniques. These include:

1. Meditation: This involves focusing your mind on a particular object, thought, or activity to train attention and awareness, and achieve a mentally clear and emotionally calm and stable state.

2. Deep Breathing: This involves taking slow, deep breaths, which can help to slow your heart rate and lower your blood pressure, thereby reducing the activity of the sympathetic nervous system.

3. Progressive Muscle Relaxation: This involves tensing and then releasing each muscle group in your body, starting from your toes and working your way up to your head. This can help to reduce muscle tension and decrease the activity of the sympathetic nervous system.

4. Yoga: This involves a series of postures and breathing exercises practiced to achieve control of the body and mind. It can help to reduce stress and anxiety, thereby reducing the activity of the sympathetic nervous system.

5. Biofeedback: This involves using electronic devices to teach you how to consciously regulate bodily functions, such as heart rate, blood pressure, and muscle tension, thereby reducing the activity of the sympathetic nervous system.

6. Guided Imagery: This involves using your imagination to visualize a calm or peaceful setting or situation to reduce stress and promote relaxation.

These techniques can be very effective in reducing stress, promoting relaxation, and reducing the activity of the sympathetic nervous system.