Tracking heart rate variability (HRV) is the hottest new trend in the fitness world for a good reason; it's possibly the best bio-indicator for overall health the industry has ever seen. High HRV values have been associated with increased mental clarity, fitness levels, decreased chance of mortality, improved psychological well-being, and improved quality of life. 
 
While there are endless ways to improve your HRV the largest changes can be found in proper sleep, nutrition, and exercise. Mastering these factors is a lifelong journey, but luckily some simple hacks can quickly improve your HRV values! In this book you will first review the physiological controls behind HRV, and then several of the most efficient methods to manipulate these controls. By applying these methods you should quickly be able to increase your HRV values.