5 fitness apps that can help you build muscle in the gym in 2026

Ensuring ethical AI practices will be crucial for the industry’s growth. User input and feedback can help in the continuous improvement of AI algorithms. As you use the app, provide honest feedback and ratings to help refine the AI’s understanding of your needs and preferences. The more data the app collects, the more personalized and…

It was comfortable — its heart-rate sensor is flat, which is a nice touch. The Fitbit Luxe has a slim, jewelry-like profile, with optional accessories that feel more like bracelets and less like sporty bands. We had a few hiccups, like when the Luxe blacked out during heart-rate testing and we couldn’t get back to…