Based on medical advice and the physical characteristics of the elderly, it is generally not recommended for people over 70 years old to stay in a steam sauna room for more than 10–15 minutes.

This means that neither land-based nor water-based exercises, including activities in a swim spa tub, can "only reduce belly fat." However, they can indirectly positively impact abdominal fat reduction by increasing overall energy expenditure, activating core muscles, and improving movement patterns.

When you soak in a spa hot tub at 37–40°C, your body undergoes a series of physiological responses: Warmth promotes vasodilation (slightly lowers blood pressure) Warm water has a natural vasodilatory effect, usually causing a slight decrease in blood pressure.

In fact, it's generally not recommended to leave the water in the spa hot tub if it won't be used for an extended period in winter. The reason is clear: when the temperature drops below freezing, pipes can burst, joints can break, filters can rupture, and even the outer shell of the hot tub can crack.

Many people believe that steam shower bathrooms are only suitable for hotels, gyms, or luxury homes. However, with the miniaturization of equipment and improvements in installation technology, ordinary households can absolutely install them.

Excessive chlorine in swim spa tubs can easily irritate the mucous membranes of the eyes, causing redness, swelling, tearing, or a burning sensation. Prolonged exposure may damage the cornea, increasing eye discomfort and the risk of infection.