Spa = SANUS PER AQUAM - Health through water… 
Even in ancient times, people knew of the healing and curative powers of water and the therapeutic effects of heat treatment and massage. But they also knew that these elements have a particularly strong effect on the body when combined. This is exactly what a whirlpool does, offering the unique combination of water – heat – air. 
The buoyant force of water makes the body feel lighter and lets it float, therefore relaxing muscles, joints and nerves. 
The heat stimulates the circulation by widening the blood vessels and increasing the blood flow. This combination of water and heat increases blood flow to parts of the body with poor circulation. An increased circulation then results in better transportation of oxygen, nutrients and other vital substances to organs, tissues and cells. 
Massage jets provide targeted relief to problem areas, relaxing tense muscles and improving circulation through them. Additionally, the massage brings about a “pumping effect“ that reinforces blood circulation in the deep tissue and internal organs. An air bubble or oxygen bath provides your body with oxygen which is then transported to blood vessels and cells. Only 15 minutes in the pool can double the oxygen saturation of your skin!

So here's our list of 10 benefits of spa we can achieve. 
1.Disengaged from work, family and friends.
2.Slow down and allows the body to re-generate.
3.Improves blood circulation hence sending more oxygen and nutrients through the body and cells.
4.Stimulates the lymphatic system to rid the body of toxins.
5.Releases Serotonin and enhancing the “feel good” factors.
6.Relives chronic pain situations – arthritis, sciatica and muscle spasms.
7.Body exfoliating treatments polishes the skin, promotes cells re-generation, refines pores and offers skin relief.
8.Water is yin and yang – when body is submerged in water, it offers true balance.
9.Heat treatments to stimulate blood circulation and initiate purifying process.
10.Body wraps to re-mineralise the body, re-charge the body with nutrients and elements, boosting moisture in the skin, helping to rejuvenate and relax the body and mind.
If you are pregnant or have any other health issues always consult your physician before using a spa.