Meta (and many third-party manufacturers) offer a wipe-clean silicone facial interface designed for fitness-oriented users. The hardware isn't waterproof, but it's quite well protected and I'd be perfectly confident to work up a sweat. Quest has calorie tracking, can sync with the fitness tracking features on iOS and Android and can pair with heart rate monitors. Fitness is one of the key segments in VR, because fitness apps and fitness-oriented users have vastly above-average engagement and retention rates.

https://www.meta.com/us/quest/accessories/quest-3-silicone-f...

https://www.meta.com/en-us/help/quest/articles/in-vr-experie...