你是否有到沙灘玩了一天回家後，感覺輕鬆又充滿活力？也許你認為是因為沙灘有鎮靜的作用。其實，別小看海浪的聲音，海浪聲音扮演了很重要的角色。

科學家發現沙灘對人體健康的益處：

有益大腦健康

科學家掃描聽海洋的聲音和交通噪音得到的證據顯示，聽到海洋聲音時，大腦前額葉皮質（prefrontal cortex）區域會被激活。這是大腦的指令與管理中樞，與智力密切相關，功能包括記憶、判斷、分析、思考和操作。

海浪產生的負離子能舒壓

沙灘上寧靜的感覺可以使我們身體的分子發生改變。因為海洋的波浪產生負離子​​，負離子會加快我們身體吸收氧氣的能力。負離子還能平衡​​血清素含量，血清素是身體有關情緒和壓力產出的化學物質。這是為什麼科學家將沙灘與精神能量和整體健康和幸福感聯繫在一起的原因。它甚至有可能讓我們睡得更好。

負離子有「空氣中的維他命」之稱，含有較多負離子化水分子的空氣，一般認為會讓生物體感到舒適愉快。

降低壓力賀爾蒙

海浪聲有一種安定人心的作用。斯坦福大學聽覺神經學家巴茨博士（Shelley Batts）在第一次藍心峰會（Blue Mind Summit）上指出，「有大量的研究已經分析出什麼類型的聲音能使人感到愉快和放鬆，什麼類型的聲音有害且有壓迫感。」

最令人放鬆和愉悅的聲音是那些具有可預測的波形，聲音也應該是中到低的音調，規律地保持著柔和的音量及和諧的頻率。大海的波浪符合了所有這些條件，他們聽起來柔和而規律。

巴茨表示，大海的聲音可能有一個更深層的情感效應。海洋的聲音「可能激發深層的記憶，或放鬆和安全的感覺，有些人甚至說這勾起了如同胎兒對母親心跳的記憶。」

有一種叫皮質醇（cortisol）的壓力賀爾蒙。一些聲音，如交通和飛機的噪音，身體會分泌皮質醇。這種壓力賀爾蒙會造成潰瘍或心臟病等健康問題。而寧靜的海浪聲音可以減少皮質醇的分泌。在這種情形下，海洋可以給我們的整體健康帶來正向的影響，防止潛在的健康問題。

海平面給人安全感

海平面也同樣能帶給我們安全的感覺。神經學家梅策尼希（Michael Merzenich）說，人類待在不複雜的地方才會有安全感。在森林中，人類不得不疲於捕食動物；在城市中，有騙子和惡棍需要警惕。然而在沙灘上，我們可以一望數英里遠，這使我們安心，因為那裡沒有潛在的威脅需要擔心。

梅策尼希表示，我們的神經系統賦予我們規範環境在我們的控制之下。因此，當我們走出望向大海，或者沿著海濱走，我們便是處在一個可預見的、穩定的環境之中。」

下一次當你看到外面陽光明媚，不妨到沙灘走一趟，對你的身心健康將有益想不到的收穫。

Did you feel relaxed and full of energy after playing at the beach for a day? Maybe you think it is because the beach has a calming effect. In fact, do not underestimate the sound of the waves. The sound of waves plays a very important role.

Scientists discovered the benefits of sand on human health:

Good for brain health

Scientists scan the sounds of the ocean and the traffic noise. Evidence shows that when the ocean sounds are heard, the prefrontal cortex area of ​​the brain is activated. This is the brain's command and management center. It is closely related to intelligence. Functions include memory, judgment, analysis, thinking, and operation.

The negative ion generated by the waves can relieve pressure

The feeling of tranquility on the beach can change the molecules of our body. Because the waves of the ocean produce negative ions, negative ions will accelerate our body's ability to absorb oxygen. Anions can also balance serotonin, a chemical that the body produces in relation to mood and stress. This is why scientists associate beaches with spiritual energy and overall health and well-being. It may even make us sleep better.

Negative ions are called "vitamins in the air," and contain more negatively ionized water molecules. They are generally thought to make organisms feel comfortable and happy.

Reduce stress hormones

The sound of the waves has a stabilizing effect. Stanford University auditory neurologist Shelley Batts pointed out at the first Blue Mind Summit that "a large number of studies have analyzed what type of sound can make people feel happy and relaxed, what type The voice is harmful and oppressive."

The most relaxing and enjoyable sounds are those with predictable waveforms, and the sounds should be medium to low, regularly maintaining a soft volume and harmonious frequency. The waves of the sea meet all these conditions. They sound soft and regular.

Bartz said that the voice of the sea may have a deeper emotional effect. The voice of the sea “may evoke deep memory, or a feeling of relaxation and security. Some people even said that it evokes the memory of the fetus’s mother’s heartbeat.”

There is a stress hormone called cortisol. With some sounds, such as traffic and aircraft noise, the body secretes cortisol. This kind of stress hormone can cause health problems such as ulcers or heart diseases. The quiet waves sound can reduce the secretion of cortisol. In this situation, the ocean can have a positive impact on our overall health and prevent potential health problems.

Sea level gives people a sense of security

Sea level also brings us a sense of security. The neurologist Michael Merzenich said that human beings are safe when they are in uncomplicated places. In the forest, humans have to be forced to prey on animals; in cities, there are swindlers and villains who need to be vigilant. However, on the beach, we can look at miles away, which gives us peace of mind because there are no potential threats to worry about.

Metznich said that our nervous system gives us the regulatory environment under our control. Therefore, when we walk out of the sea or walk along the waterfront, we are in a predictable and stable environment. ”

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