A few of the most important insights are heart rate variability (HRV), which describes the difference in time between the ...

Understanding your heart rate is crucial for more than just reaching optimal fitness–it can also help to reduce injury and ...

Heart rate variability (HRV) typically increases with parasympathetic activation (rest-and-digest response) and decreases with sympathetic activation (fight-or-flight response). The autonomic nervous ...

Experts discourage regular consumption of energy drinks. High caffeine content paired with the supplemental ingredients in ...

Giving adrenaline to hospital patients whose heart has stopped is very effective, and can increase the chance of bringing their heart rate back to normal by a factor of five. When a patient's heart ...