The spring time change brings hours of daylight, the days get longer, but the alarm still seems to ring too early. So there's one ritual that helps us get going more than any other: coffee . More than the light filtering through the windows, more than the motivation to face the day, it's that burst of caffeine that gives us the initial push. But if it's a precious ally in the morning, are we sure it's the same at any time?
How many per day? The recommended quantities
Let's start by defining the number of cups recommended daily by the main nutritional guidelines . Moderate caffeine consumption is considered safe for a healthy adult. The general rule is 300-400 mg of caffeine per day, equivalent to about four or five cups of espresso and only three or four of Americano, depending on the preparation.
In these amounts, we can benefit from the positive effects of caffeine, such as increased attention and concentration, without incurring significant side effects. Of course, tolerance varies : some people feel agitated even with just one cup of coffee, while others consume more without apparent discomfort. But not experiencing symptoms doesn't mean not experiencing any effects, so the advice is still to stay within your daily limits.
The real sticking point: timing
More than the quantity, it's often the time of consumption that makes the difference . Caffeine, in fact, has an effect that can last up to six or eight hours after ingestion. This means that a cup of coffee drunk in the afternoon can still be active when we prepare for bed. To give a practical example: if we go to bed around ten or eleven at night, a coffee drunk after two in the afternoon can still interfere with sleep, perhaps making it difficult to fall asleep.
The signs of caffeine interfering with sleep can be subtle and often overlooked. Difficulty falling asleep, light sleep, nighttime awakenings, a reduction in deep sleep, waking up tired, but also confusion or difficulty concentrating the next day, irritability, and a lack of reflexes and coordination are all signs of sleep disruption. For those who use technology and monitor their sleep, it's easier to recognize the effects of caffeine on the nocturnal recovery phases . When this balance is disrupted, a vicious cycle is triggered: we sleep worse, wake up more tired, increase our intake, and thus further worsen our sleep.
Night shift workers in particular need to be careful, as caffeine can delay the rise in melatonin by three to four hours . Melatonin is the hormone that signals our body when it's time to rest, regulating the sleep-wake cycle . In shift workers, this interference with normal melatonin peaks may offer a brief boost in alertness, but if not managed in moderation, it can cause metabolic and hormonal imbalances in the long term, compromising well-being.
Advice
A simple strategy is to move the caffeinated cup to the early hours, leaving room for decaf in the afternoon or evening. During stressful times, protecting your sleep becomes a priority. Decaf allows us to maintain our coffee ritual without interfering with sleep.
For athletes, however, caffeine is a powerful ally in improving performance by reducing the perception of fatigue. Those who use caffeine gels during training or competitions should carefully plan the occasions when they want to reap the greatest benefits. In fact, if caffeine is consumed habitually, without a period in which coffee consumption is reduced or suspended, the body develops tolerance . Consequently, the benefits induced by consuming caffeine gels or coffee fade, although the effects on melatonin and therefore sleep persist.
In conclusion, coffee is a precious ally, but the keys are once again awareness and balance . Respecting the timing and frequency allows you to enjoy the coffee ritual without increasing stress or compromising your well-being.
