Movement in the water conveys well-being and b alance. Weightlessness and distance from the stress of everyday life help people to find themselves and gain a new relationship with his body. Body, soul and spirit are again perceived as a unity. The positive physical stimuli of hydro-massage lead to a positive mood: we feel well again in our skin.
Physical and mental relaxation is a correlation. The physical relaxation is a measurable lowering of muscle tone. Nerve impulses that stimulate the muscle to tension, become less, the existing basic tension decreases slightly, the muscle relaxes. Something similar happens in mental-spiritual relaxation in the brain. The frequency in which the neural networks of the brain communicate with each other, decreases measurably. The hydro massage can help through physical relaxation to reach mental and emotional b alance.
Of course, we can also consciously share our relaxation with other people and enjoy the bathing experience together. This has a long tradition. When bathing, the social position and importance disappears and man comes to the foreground.

Buoyancy
Each body loses in water seemingly as much weight as the amount of fluid it displaces weighs (Archimedes principle). This is 10 % of our body weight. When we are standing up to our neck in the water, our body weighs only 10 % of our normal body weight. The result is a feeling of lightness and muscle tension is reduced. Relieving of the joints results in pain relief. The easier movement in the water increases the motion range in the joints.

Water temperature
Whether we feel a bit cold or warm is mediated by receptors in the skin. The cold receptors are more superficial in the skin than the heat receptors. However, the temperature perception is dependent on the temperature difference and the stimulus area. Indifferent is the range between 22°–24°C in the air, and in the water between 34°–35°C. For hydro-massage through massage jets, the range from 27°C water temperature is suitable because the bather actively massages and therefore requires a rather „invigorating“ water temperature.

Hydrostatic pressure
Air pressure is important for maintaining body function. In addition to the air pressure, the weight of the water as a hydrostatic pressure has a positive effect on our body. The following effects are achieved:

• Cardiovascular stimulation: The pressure of the water on the veins (blood vessels that bring the spent blood back to the heart) reduces its lumen (inner diameter of the vessels). This will pump blood back to the heart more quickly and increase cardiac output volume, i.e. the heart pumps more blood to the periphery per beat.
• Stimulation of the lymphatic system, the body circumference can decrease by several centimeters.
• Deeper breathing: i.e. more oxygen is absorbed into the blood.

Reduction of muscle tension and stimulation of the metabolism
Massage reduces muscle tension and stimulates the metabolism. A tense muscle leads to reduced blood flow, i. e. metabolic waste products are not transported away, nutrients do not get into place, hyperacidity occurs in the intercellular space. Through the massage, the muscle softens, its diameter decreases, it comes to a better circulation, to an improved oxygenation of the cells, skin pores open and toxins are flushed out.

Circulation increase
It has been proven that the massage leads to increased blood flow to the skin and underlying muscles. Due to the mechanical stimulus, mast cells are stimulated to release a tissue hormone (histamine), resulting in enlargement of the capillaries. Capillaries are tiny blood vessels that serve for the exchange of substances between blood and tissue.

Pain relief
The pulsating effect of hydro-massage positively influences skin, connective tissue and musculature. We rub and press a painful spot in order to soothe the pain. This age-old experience is probably at the bottom of all massaging. As a result of pressing and rubbing, specialized perceptive cells in the skin (mechanoreceptors) transmit a large number of signals to the central nervous system, thus ”cover up” the perception of pain.

Activation of life force
The massage jet causes acupressure of the acupuncture points and activation of the energy pathways in the body. It is interesting that the human being feels what is good for him.

Psychic effect
Most people find a massage to be very pleasant. This feeling of relaxation and “feeling good” is registered in our brain, the limbic system. This reduces the release of stress hormones, stabilizes the immune system and improves wound healing. The relaxation we experience also leads to a relaxation of the muscles, the vegetative nervous system (sympathetic) calms down, i.e. blood pressure, heart rate and respiratory rate decrease, as well as the sensation of pain, the general condition improves. Fears and depressive moods also improve.