A person's heart rate and blood pressure can change when they face sudden stress. This is known as cardiovascular reactivity. Some people believe that faith and spirituality can help manage this stress. However, research on this topic has mixed results. Some studies show that strong beliefs can help, while others suggest it might not always be helpful. To make s...

Military training is tough. It is designed to push people to their limits. This is done to prepare soldiers for the intense conditions they might face in real-world scenarios. One way to measure the stress of this training is by looking at heart rate variability (HRV). HRV is a measure of how the heart responds to different situations. It can tell us a lot about ...