When used correctly, continuous resistance to water currents using a swim spa tub fully conforms to the physiological definition of aerobic exercise. Key reasons include: • Primarily relies on aerobic metabolism for energy • Sustainability • Heart rate can be maintained within the aerobic zone etc.

The core objective of shutting down a swim spa tub in winter is singular: Ensure there is no water in the system that can freeze. This typically requires: • Draining the water • Cleaning the filtration system • Releasing residual water from the pipes

Steam dilates skin capillaries, increasing blood flow to the epidermis. Increased blood flow promotes the transport of nutrients and oxygen, aiding skin metabolism and waste removal, thus improving skin tone to some extent and making the skin appear firmer and more radiant.

While the external dimensions may vary slightly between brands, most 3-person spa hot tubs fall within the following range: • Length: 1800 – 2000 mm • Width: 1200 – 1500 mm • Height: 700 – 850 mm

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.