Resting heart rate: how pulse changes can signal hidden health issuesResting heart rate (RHR) serves as a primary marker for assessing cardiovascular health without specialized equipment. Stable pulse readings typically indicate normal heart function, while persistent deviations from an individual's baseline may signal underlying issues, ranging from micronutrient deficiencies to thyroid dysfunction. This metric is closely linked to general metabolism; for instance, a body temperature increase of 1°C can raise the heart rate by 8–10 beats per minute. Deviations such as tachycardia (accelerated heart rate) or bradycardia (slow heart rate) often accompany endocrine disorders. "Changes in metabolism caused by poor nutrition or hidden inflammation often reflect in the pulse before obvious symptoms appear."