Smart headbands claim to make people calmer. Do they work?

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Devices that measure brainwaves are increasingly being used by athletes to improve their performance. …

So, she contacted the firm behind the product, Massachusetts-based BrainCo. Given her relevant university studies, and her weightlifting and winter sports participation, they invited her to become a part-time, but paid, researcher for a few months in 2020. and again earlier this year.

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