The heart of a healthy young person, between 15 and 20 years old, usually beats a minimum of 60 and a maximum of 90 times per minute. But if your heart rate sporadically exceeds or drops below that range, it doesn’t mean you have some kind of illness. “The heart is connected to the brain and the body by nervous stimuli and they are what tell you how hard it needs to work”, says cardiologist Antônio Carlos Carvalho, from Unifesp.
In some people, the sympathetic nerve (which releases adrenaline) works harder, making it easier for the individual to notice when the heart is racing. In other people, the action of the vagus nerve (which breaks the heartbeat) is more noticeable. Just a situation that stimulates one of the two nerves and that’s it. When you’re working out, for example, your heart rate can reach 150 or 160 bpm (beats per minute) without this posing a health threat.
Now imagine that you are in your thousandth sleep. Lying in bed, not moving or making any effort, your metabolism is much less intense and your brain practically shuts down. Why would your heart race? While we sleep, it is normal for our heart rate to reach 40 bpm, also without causing any problems. After all, you always wake up well the next day, don’t you?
Another factor that greatly influences heart rate is age. A newborn has between 120 and 140 bpm, as their circulatory system regulation systems are not yet well developed.
The higher heart rate helps deliver more oxygen to babies’ hearts. As they grow, the heartbeat slows down. Decades later, in old age, the beats will probably be even more spaced out, in a range between 50 and 80 bpm.
deregulated engine
Each heart has its rhythm, but sudden changes can lead to death
With your foot on the brake
A very low heart rate causes less oxygen to circulate through the body. With you lying still, or even sleeping, chances are there’s no problem if your heart is only 30 bpm. But this frequency with you awake, standing up, can cause fainting and, in extreme cases, lead to death.
ideal limit
For a healthy young person, the normal rate is between 60 and 90 bpm. But an athlete, for example, can have a heart rate of 40 bpm and that is absolutely normal. It’s just that his heart is very efficient: each pump delivers much more blood to the body than normal, so he needs to beat less often.
Speeding
The heart has two movements: diastole (when the organ fills with blood) and systole (when blood is pumped through the body). When the heart speeds up, it shortens diastole. Thus, the organ sends less blood to the body, causing tiredness and fainting. A heart rate close to 180 bpm is a total warning sign and danger of death.
Source:Marcelo Bertolami, cardiologist at Instituto Dante Pazzanese (SP)