Breathing techniques are the easiest, cheapest and most direct way to willingly influence one´s autonomic nervous system. So everybody can live more healthy by simply learning controlled breathing. There are even some free Pranayama Apps with pre-defined breathing patterns. Also, I like combining breathing exercises with mindfulness meditation :-) There is plenty of free information on both mindfulness meditation and breathing exercises on the internet. On google scholar one can also look up some scientific studies on the benefits of controlled breathing, there are some interesting research papers. Have a nice day everyone! Feel free to contact me if you have questions on the topic :-)