Final answer:
An easy technique for increasing heart-brain coherence is to sit upright, use calm phrases, and focus on pleasant thoughts.
Step-by-step explanation:
An easy technique for increasing heart-brain coherence can be done anytime, anywhere. One technique is to sit upright on a comfortable chair with feet on the ground and body in a relaxed position. Being in a quiet environment with eyes closed can help to focus better. Another technique is to repeat a word or a phrase to oneself, such as "alert mind, calm body." Lastly, passively allowing the mind to focus on pleasant thoughts, such as nature or the warmth of your blood nourishing your body, can also increase heart-brain coherence.