Cardio load gets a major fix in the new Fitbit app, which Android users can test out starting this week in a “public preview.” (This is the same preview that gives you access to the AI fitness coach, which I tested yesterday, with baffling results.) Cardio load will now be tracked weekly, making it much easier for the app to make sensible recommendations.

What is (and was) cardio load?

The cardio load feature is Fitbit’s attempt to guide you in how much to exercise. Obviously a beginner shouldn’t jump into hour-long hard workouts right out of the gate, nor should a person training for a marathon slack off for no reason. Cardio load is an attempt to put a number on the amount of exercise that would be neither too much nor too little for you.

Plenty of athletes and trainers use some kind

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