Health and the sea: that's a team that simply belongs together!
We'd best start with a somewhat dry definition: "Stimulating climate" is the term for certain meteorological or climatic conditions that can stimulate and strengthen the body's metabolism. Such climatic conditions can be found mainly on the coast, on islands and in high mountains.
Here on Juist, for example, wind speeds are on average much higher than on the mainland, which means that you have to exert yourself more to walk. Also, temperatures are usually lower than in other places, or at least perceived as lower (keyword: wind). In addition, since we are surrounded by water, the UV radiation levels on Juist are accelarated, which leads to more vitamin production for you.
The stimulating climate of Juist, for example, causes you to get tired faster and sleep more deeply. But the clean sea air also ensures that your respiratory tract recovers. Your organism is strengthened and your immune system is boosted. So: A vacation on Juist in the stimulating climate alone is good for your health.