Swimming is the undisputed king of full-body exercises. Easy on the joints, swimming challenges and improves every inch of your body — but public pools are gross and gym pools are inconvenient.

No, you want to exercise in the comfort of your own home — or at least in your backyard. You need a pool.

Sure, backyard pools allow you to swim at home. You’ll swim in the morning before you leave for work. You’ll swim in the evening when you return. You’ll swim so much that your body will become a sleek, hard, half-human/half-fish cardio machine with rippling muscles and lungs like a gazelle.

Then October will come. You’ll go outside in sweatpants and a hoodie. You’ll winterize your pool, blow out the plumbing, tie down your pool cover, go back inside and take a hot shower because you’ll be freezing.

You will then spend the next five months watching leaves and ice build up on the cover of your useless, expensive, half-filled water pit.

Let’s rewind. What if you had invested in a swim spa, instead?

Endless Pool Entering Blue

Swim spas let you swim all year round, in any weather, indoors or out, for a fraction of the price of an inground swimming pool. Deep, wide, high-volume currents are fast enough to challenge even Olympic-level swimmers.

They come with covers that protect the pool, prevent accidents and provide insulation, which reduces evaporation and keeps water toasty warm. They require just a fraction of the chlorine, so your house doesn’t smell like a swim club.

Most importantly, they’re fun. Nine out of 10 owners still use their swim spas weekly after 10 years — and they don’t have to quit in October.