Chronotropic Action

Chronotropic action is the body’s ability to adapt to changes in the time of day, which affects its physiological and biochemical processes. This action can be caused by various factors such as light, temperature, humidity, gravity, etc.

The chronotropic effect is manifested in changes in the activity of various organs and systems of the body, such as the cardiovascular, respiratory, digestive and nervous systems. For example, during the transition from night sleep to wakefulness, the body begins to prepare for vigorous activity, increasing the heart rate, increasing the level of glucose and oxygen in the blood, improving blood supply to the brain, etc. At night, on the contrary, the body relaxes, slowing the heart rate, reducing glucose and oxygen levels, reducing blood flow in the extremities, etc.

In medicine, chronotropic action is used to treat sleep disorders, memory problems, depression and other mental disorders. Chronotropic effects can also be used in sports to improve performance and recovery after training.

However, do not forget that the chronotropic effect can be harmful if used incorrectly. For example, too much sun exposure can lead to overheating and heatstroke, and too much artificial light use can cause circadian rhythm disruption. Therefore, before using chronotropic effects, you must consult your doctor and follow all recommendations.



From the Greek language chronos is translated as “time”. Chronotropes are substances that affect the speed of time.

The mechanism of action of chronotropes may be different. In most cases, when taking them, time is felt subjectively differently. But there are chronotronic substances without a pronounced subjective sensation of changing the speed of time, which nevertheless change the perception of time in other people.