If you have a Fitbit Charge 2, 3, or 4 devices with heart-rate tracking you can track your overall cardiovascular fitness with the Fitbit app.
Cardio Fitness Chart

There’s a slight up tick because of about 5 pounds in weight loss.
What is The Cardio Fitness Score?
The Cardio Fitness Numbers are a combination of a resting heart rate, age, sex, weight, sleep, and how well oxygen is used while working out. Fitbit has a very good explanation on its website and on the phone app.
How can I follow my Cardio Fitness score?
On your phone open up the Fitbit app. and scroll to beating red heart and open it. The first screen is your heart rate at rest, swipe the chart to the left and you will see your Cardio Fitness Score.
Tracking the Cardio Fitness Score
Cardio Fitness for September 2022
My weight has dropped off and expected a higher score.

Cardio Fitness for October 2021
Up a notch from last month.
Cardio Fitness Score for September 2021

My score of 42 to 46 is excellent for men in my age group.
Cardio Fitness for July 2020
Cardio Fitness for July 2020 moved up by 1 point from last month.
Cardio Fitness for April 2020
By far my worst numbers since I’ve started adding this chart to the site. This chart looks at your cardio fitness score from your resting heart rate, age, sex, weight, and other personal information.
Cardio Fitness for May 2019
Excellent Nice! Fitbit says my score is related to weight and to bring my score up I should lose weight but be careful not to lose muscle.
Best Cardio Fitness Numbers So Far
These are my best numbers to date. This chart was taken on August 8th, 2018.
July, 2017
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p style=”margin:21px”> Observations This has moved up 1 point from 42 – 46 and thought I could move it up higher with more steps or longer walks.
Actions & Goals I\’d like to see this get to into the 60s by the end of the year. Now I\’m not too sure I can accomplish this by the end of the year.
June, 2017
Observations Surprised to see this so high, since I’ve been working as a web designer I’ve taken little care of my health and so considered my heart health less than average.
Actions & Goals I’d like to see this get into the 60s by the end of the year.
Cardio Fitness or Overall Heart Health
This chart gives an overview of your heart rate health.
There’s a good description online, in short, I believe it measures how hard your heart works while resting and at peak periods while working out and then determines how efficiently the heart works with the rest of your body.
This is why it’s so important to lower or follow your heart at rest.
How can I see a chart of cardio fitness levels for various ages. I want to know how fit I would be if younger. Alternatively, how can I get the device to think I’m younger. I want to amke things more challenging.
Challenges are fun and with the Fitbit app, I think the only way is to change your age on your profile.