Our expert says:
No, they're pretty ineffective. I'm not sure how they survived, I guess along with many other gimmicks in the industry, there is always a demand for that kind of thing, so they survive. But they won't work very well, just like the others.
Unfortunately, no magic bullets or miracle tools to help with weight loss, only work and time and a good diet. Cardio training is certainly the way to go.
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