FitnessView
🎯 Zone Distribution Calculator
See how your workout minutes are split across heart rate zones. This makes it easy to tell whether a week was mostly aerobic, mostly threshold, or something in between.
Calculator
Mostly Zone 2 for base work. More Zone 4-5 for speed or race prep. The best mix depends on your goal.
Why This Matters
Zone distribution is a nice reality check because it shows whether a week was actually mostly aerobic or if the hard sessions quietly took over everything.
When you can see the split, it becomes much easier to decide whether the next week should stay the same or shift toward more speed, more base work, or more recovery.
Reference Ranges
Example Calculations
| Input | Result |
|---|---|
| 40 / 60 / 20 / 0 / 0 minutes | A mostly aerobic week |
| 10 / 15 / 20 / 15 / 5 minutes | A mixed intensity week |
How FitnessView Helps
FitnessView can show the zone distribution in a much richer dashboard, but this calculator makes the split obvious in a glance.
That helps you tune the week before your body forces the issue.
Tips
- The distribution is more useful over a week or month than for a single workout.
- Watch whether your easy days are actually easy.
- A polarized mix often shows a big chunk in Zone 1-2 and a little bit in Zone 4-5.
- FitnessView is great for spotting when your zone balance starts drifting.
Frequently Asked Questions
Should every week look the same?
No. Training blocks change. But if the pattern drifts too far from the goal, it is worth correcting.
What if I do multiple sports?
That is fine. The calculator still works if the zones come from all your workouts combined.
Do I need perfect zone definitions?
No, just consistent ones. The trend matters more than an exact lab test.
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