Improve the VO2 max anchor
Because VO2 max carries most of Wellness Project Cardio Age when it is available, improving cardiorespiratory fitness is the clearest lever. A sustainable plan usually combines a large base of easier aerobic work with smaller doses of harder intervals, progressed gradually enough that you can repeat the work week after week. Running, cycling, rowing, swimming, brisk uphill walking, and other aerobic modes can all contribute if the intensity and volume are appropriate for you.
Let resting heart rate and recovery improve as outcomes
A lower stable resting heart rate can accompany improved aerobic fitness, but trying to force one morning’s number down misses the point. Sleep, illness, heat, hydration, stress, medication, and recent training can all move it. Heart-rate reserve and HRV are also context-sensitive. Focus on consistent training and recovery habits, then read the multi-week direction rather than optimizing a single day to make the score look better.
Train the inputs, not the vanity number.
Wellness Project shows Cardio Age beside training, recovery, movement, and the heart data behind it so you can judge whether the underlying fitness is actually improving.
Use the whole Healthspan picture to keep cardio work sustainable
Cardio fitness does not live alone. Strength supports durability, Active Living captures the movement outside formal workouts, and sleep and body or metabolic factors can affect how well training fits into the rest of your life. Wellness Project keeps Cardio Age inside Healthspan for exactly that reason: a younger-looking cardio estimate is not useful if you got there by piling on training you cannot recover from.
Watch your Cardio Age move with the fitness behind it.
Connect your cardio and heart data, follow the underlying trend, and use the rest of Healthspan to keep the plan balanced.
