Sea Vacation and Human Health: A Scientific Analysis of Thalassotherapy and Recreational Potential Sea vacation represents a comprehensive biopsychosocial phenomenon, whose therapeutic effect is due to the simultaneous action of unique natural factors — the marine environment. These factors, including seawater, aerosols, climate, and psychological perception of space, have a modulating effect on all body systems. Physical-chemical bases of the impact of the marine environment Seawater as a mineral solution. The average salinity of the ocean is 35 g/l, and the ionic composition (predominating Na⁺, Cl⁻, Mg²⁺, Ca²⁺, K⁺, SO₄²⁻) is close to plasma and intercellular fluid. During swimming, ions penetrate through the skin (transdermally), especially in the presence of microtrauma. For example, magnesium participates in hundreds of enzymatic reactions and has anti-inflammatory and spasmolytic effects. Iodine evaporating from the water surface is necessary for the synthesis of thyroid hormones. Marine aerosol. Waving creates tiny droplets (aerosol) enriched with salts, organic compounds, and negative ions. When inhaled, particles of 1-5 μm settle in the lower respiratory tract, exerting mucolytic and mild irritating effects, which stimulate the cleansing of the respiratory tract. This is the basis of climatic therapy for chronic bronchitis, rhinitis, and post-pneumonia states. Hydrostatic pressure and thermoeffect. Water pressure improves peripheral circulation, promotes lymph drainage, and has a light massage effect. The contrast between water temperature (usually below body temperature) and air trains the vessels and thermoregulatory system, serving as a form of hardening. Major therapeutic directions (Thalassotherapy) Thalassotherapy is the scientifically justified use of marine resources for therapeutic and preventive purposes. Its effectiveness has been confirmed for a number of conditions: Dermatology. Seawater, rich in salts and trace elements, promotes epidermis rege ... Read more