The HeartMath Institute

The HeartMath Institute offers "scientifically based tools that bridge the connection between heart and mind and deepen people’s connection with the hearts of others. This empowers people to greatly reduce stress, increase resilience and unlock their natural intuitive guidance for making better choices." Leyza became a certified HeartMath Coach in 2015.

Here is a sampling of videos for additional information: 
The Institute of HeartMath: Science, Education, Stress Solutions & Much More
The Hearts Intuitive Intelligence: A path to personal, social and global coherence
What is Social Coherence?