Apple Watch’s VO2 cardio fitness alerts reveal bigger health problems for one user<div class="feat-image">
![](https://9to5mac.com/wp-content/uploads/sites/6/2020/12/cardio-fitness-on-apple-watch-and-iphone-lead.jpg?quality=82&strip=all&w=1600)
</div><p>The Apple Watch’s array of different health features has alerted countless users to potentially life-threatening problems over the years. This week, a new report
published in the
Interactive Journal of Medical Research sheds light on a different type of Apple Watch notification that could signal bigger health problems.</p>
<a href="
https://9to5mac.com/2023/08/17/apple-watch-vo2-monitoring/#more-902270" data-post-id="902270" data-layer-pagetype="post" data-layer-postcategory="apple-watch" data-layer-viewtype="unknown" class="more-link">moreâ
Apple Watch’s VO2 cardio fitness alerts reveal bigger health problems for one user