[shaggy eel]

The study looked at 10 men and 10 women who exercised regularly and ranged in age from 20 to 28 years old. The goal was to isolate the physiological responses to each heating method in a young, healthy population.

,,, very limited number of people in a very specific age range. I thought hot water soaking would pump the blood pressure up. Get back to us when the survey includes people in their sixties. In the next three weeks I'll be buying a sauna [infra red]. It takes up less space than a hot tub and the running costs are confined to time of use, rather than a spa pool staying heated. Also the maintenance factor is worth consideration.

[ConservativeMind]

You likely have a bathtub already.

That is a hot tub, for this purpose.

[TexasGator]

“I thought hot water soaking would pump the blood pressure up.”

Since you think wrong, maybe you need to rethink your options.