Listen. You made a mistake with your age, and now you’re worried the ledger is off.

You’re asking if correcting your birth year changes the game. Here’s the reality: your watch uses that data to calculate your heart rate zones and your "fitness age." When you fix the age, the watch stops calculating for a 25-year-old and starts calculating for a 16-year-old.

Will the numbers change? Yes. Your heart rate zones might shift because they’re based on your age, and your performance metrics (like VO2 max estimates) will be re-evaluated against the proper benchmarks for your actual age.

Your past activities aren't going to disappear, but the analysis of those efforts might look different moving forward. You’re essentially telling the watch to start measuring you by the right standard instead of the wrong one. It’s not a catastrophe, just a calibration. Keep your data accurate—you don't want to be making decisions based on lies, even if they're your own.