Dean Karnazes - Wow! The new #fitbitcharge2 has a Cardio Fitness Level tool that estimates your VO2 max. Time to start sprinting! #teamfitbit #fitbit #findyourfit Fitbit | Facebook
![i did it! after 9 weeks of training, i raised my VO2 max from 39 to 44.6. i feel really good. - fitbit post - Imgur i did it! after 9 weeks of training, i raised my VO2 max from 39 to 44.6. i feel really good. - fitbit post - Imgur](https://i.imgur.com/Lr8ZL8Cg.jpg)
i did it! after 9 weeks of training, i raised my VO2 max from 39 to 44.6. i feel really good. - fitbit post - Imgur
![Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker](https://media.dcrainmaker.com/images/2016/08/iPhone_Fitbit_App_V02Max_Men_300dpi.jpg)
Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker
![Which one should I believe? I personally tend to Fitbit. Garmin says I'm worse than before but I don't feel that way. : r/GarminFenix Which one should I believe? I personally tend to Fitbit. Garmin says I'm worse than before but I don't feel that way. : r/GarminFenix](https://preview.redd.it/7ufcccz21ug91.jpg?auto=webp&s=1342fe155c9ae8bdaad8fad0077b8a60028fc007)
Which one should I believe? I personally tend to Fitbit. Garmin says I'm worse than before but I don't feel that way. : r/GarminFenix
![Fitness levels accurately predicted using wearable devices – no exercise required | University of Cambridge Fitness levels accurately predicted using wearable devices – no exercise required | University of Cambridge](https://www.cam.ac.uk/sites/www.cam.ac.uk/files/styles/content-885x432/public/news/research/news/fitness-monitor.jpg?itok=72P751OH)
Fitness levels accurately predicted using wearable devices – no exercise required | University of Cambridge
![I finally got an exact cardio fitness score! I read recently how you need to GPS track a couple of 10min+ runs for a more specific score (I was at a range I finally got an exact cardio fitness score! I read recently how you need to GPS track a couple of 10min+ runs for a more specific score (I was at a range](https://i.redd.it/kjbsnmai47361.jpg)