Today, we're going to talk about a little fitness device that's been all the rage in recent years, thanks in no small part to the heavy advertising of smartwatches being a reliable fitness tracker.

今天，我们将讨论一种近年来风靡一时的小型健身设备，这在很大程度上要归功于大量的广告宣称智能手表可作为可靠的健身跟踪设备。