![Sudden drop or change in cardio fitness score (VO2 max) on your Apple Watch and iPhone Health app? - MyHealthyApple Sudden drop or change in cardio fitness score (VO2 max) on your Apple Watch and iPhone Health app? - MyHealthyApple](https://www.myhealthyapple.com/wp-content/uploads/Health-app-iPhone-Sudden-drop-in-Apple-Watch-cardio-fitness-score.jpg)
Sudden drop or change in cardio fitness score (VO2 max) on your Apple Watch and iPhone Health app? - MyHealthyApple
![Has anyone else had a huge increase in VO2 Max over just one month? It went from 18 to 45. : r/AppleWatch Has anyone else had a huge increase in VO2 Max over just one month? It went from 18 to 45. : r/AppleWatch](https://external-preview.redd.it/uHxDpSWeRrZG2vcWkBQAh59mFlYY_kKdp11XAG5cEEw.jpg?width=640&crop=smart&auto=webp&s=4cc83f0369f2c6edfdf2eb0aeb365849a31320ed)
Has anyone else had a huge increase in VO2 Max over just one month? It went from 18 to 45. : r/AppleWatch
![In the last 2 months I measure my VO2 max with Apple watch and NRC, but this improvement seems sick. : r/AppleWatchFitness In the last 2 months I measure my VO2 max with Apple watch and NRC, but this improvement seems sick. : r/AppleWatchFitness](https://external-preview.redd.it/VuczORIRzPbRQaRMCjIg-gJTP_se_JherSIZvRT1ZOo.png?format=pjpg&auto=webp&s=b10743d6ebc7ee229f2376455043b4f81355163a)
In the last 2 months I measure my VO2 max with Apple watch and NRC, but this improvement seems sick. : r/AppleWatchFitness
![Cinco relojes que miden el oxígeno en sangre (VO2 máx) pero que son más baratos que el Apple Watch Series 8 | Computer Hoy Cinco relojes que miden el oxígeno en sangre (VO2 máx) pero que son más baratos que el Apple Watch Series 8 | Computer Hoy](https://cdn.computerhoy.com/sites/navi.axelspringer.es/public/media/image/2022/09/persona-vistiendo-reloj-inteligente-muneca-2808277.jpg?tf=3840x)