Training Distribution on PowerCenter shows how your workouts compare to runners with a similar goal. Each metric below tells you something different about your fitness. Tap any one inside the app to see tailored workout suggestions.
You can find Training Distribution to the right of your Power Duration Curve on PowerCenter.
Fitness
A snapshot of your overall running fitness, based on your entire training history. It's calculated automatically using your Critical Power (CP), or you can enter a CP value manually.
How to improve it: Work on all areas of your Power Duration Curve (PDC) — a mix of short, hard efforts and longer, steadier runs will raise this score over time.
Muscle Power
How much raw power your legs can produce in a short burst. This is measured using the first 10 seconds of your Power Duration Curve. Think of it as your sprint capability.
How to improve it: Add strides and hill repeats to your weekly training. These short, intense efforts train your muscles to generate more force quickly.
Fatigue Resistance
How long you can hold your goal race pace before your muscles give out. This metric is specific to your race distance and target finish time. So it will look different for a 5K goal vs. a marathon goal.
How to improve it: Practice running at your goal race effort for progressively longer stretches during training. The more time you spend at that effort, the more resilient your muscles become.
Why might this score drop? As your Critical Power (CP) increases, your Fatigue Resistance can temporarily decrease. This is normal. A higher CP raises the bar for what counts as "race effort," so your muscles need time to catch up.
Endurance
The longest duration you can sustain continuous running. Ideally, this should be close to how long your goal race will take, but it's okay if it's longer, especially for shorter races like a 5K.
How to improve it: Gradually extend the length of your long runs. Consistency matters more than any single big effort. Aim to build this steadily week over week.

