Nah, it's still "a little niche" ....
Sorry to disagree, but in general, America is currently full of people who have been harassed and scolded by doctors to "lose some weight". They're looking for solutions, and wasting a lot of money on bogus fitness products that don't deliver the promised results.
Anyone remember the "Ab Lounge" they kept hawking on late-night television infomercials? That contraption was little more than a modified folding lawn chair! And despite knowing dozens of people who blew hundreds of dollars on supplements and other pills at their local GNC store or the like, I haven't seen any of them get the results those bottles promised them.
Even a basic "gym membership" has typically become a scam. You can't just pay as you go most of the time. Instead, you're pressured to sign up for some 1 year term or more. They know full-well, half the people are going to wind up moving or going through other life changes, so they stop showing up - and then they've essentially paid for nothing.
At some point, this "huge and lucrative market" has to get saturated. People decide their basement full of exercise machines and gadgetry has let them down, and they simply don't need ANOTHER device in their collection.
I daresay that besides the "niche" market of people making a lifestyle out of fitness, most people could really accomplish their "lose some weight" goals without ANY of this equipment/gear. Go to your local park and jog, or use their free fitness courses (made from simple chains, ropes, and planks of wood, no less!). Make an effort to eat healthier.
It is way more than a little Niche. It is a huge and lucrative market.
I have done fitness marketing for fitness centers all over the USA for over 16 years.
The possibilities for this are pretty large.