I put off testing the  Whoop band  for six years. It's a screenless fitness tracker built for serious athletes, and the sheer volume of training metrics always felt a little intimidating to me as a mere mortal. The Apple Watch , on the other hand, is like that approachable friend who speaks to you on your level -- much more my speed, six years ago. But after seeing how many Whoop owners love the band, it was time to confront what intimidated me and see if it could outperform my Apple Watch Series 11. Two months later, the Whoop has transformed the way I work out and surfaced insights about my own body that weren't on my radar before. Don't mistake this for a breakup story -- I'm not ditching my Apple Watch, yet. The wearable space is evolving rapidly, with AI opening up the possibility of finally turning years' worth of raw health and fitness data into actual advice.…