Week of Sep 7, 20263 workouts · 80.0 min in Zone 2
No weekly goal set.
FREE WORKOUT ANALYZER
Your workouts.
One clear week.
See how much time you actually recorded in each heart-rate zone. Bring your FIT or TCX files, review your week, and keep the results.
Free · No account · Files stay in your browser
YOUR WEEK, AT A GLANCEFictional example
80min in Zone 2
20
MT
25
WT
F
35
SS
3 workouts120 min recorded3 min unclassified
Empty days: no record imported. Not assumed rest days.
01 Combine your workouts02 See every zone & data gap03 Save the table & chart
START WITH YOUR RECORDS
From activity files to answers.
Use the zone limits you already use on your device. We count recorded time; we don’t set training targets.
1 / ADD YOUR WORKOUTS
Drop FIT or TCX files here
Choose up to 12 files, 8 MiB each.
Single-sport activities with timestamped records.
No upload. No GPS, device IDs or names used. Refresh or clear to remove your records.
Showing a fictional sample. Import files to see your own review.
Where do I get a file?
Export a recorded activity from your current service as FIT or TCX, then choose it here. If the export is a ZIP, extract the individual activity files first.
Strava’s export instructions · Garmin’s export instructions
Not supported: Apple Health ZIP/XML, GPX routes, summary-only records, multisport FIT or direct watch syncing. Heart-rate gaps remain visible as unclassified time.
Included records
Overlapping activities are excluded from totals until you remove one. Exact duplicates are skipped.
FICTIONAL SAMPLE · NOT YOUR RECORDS
Your weekly review
Time in Zone 280.0 min
Recorded span120.0 min
Unclassified3.0 min
HR coverage*98%
*Classified time ÷ recorded time excluding explicit FIT pauses. Totals cover the selected workouts only; an unimported day is not a rest day.
Where your recorded time went
- Zone 11–109 bpm15.0 min
- Zone 2110–129 bpm80.0 min
- Zone 3130–149 bpm17.0 min
- Zone 4150–169 bpm5.0 min
- Zone 5170–254 bpm0.0 min
- Unclassified3.0 min
- Paused0.0 min
Week by week
Monday–Sunday · Asia/Shanghai. A workout crossing a week boundary is split by timestamp.
Each workout, explained
1. Running · Sep 7, 202620.0 min Z2
30.0 min recorded span · 0.0 min unclassified · 0.0 min explicitly paused. No extrapolation before the first or after the last record.
- Zone 1
- 5.0 min
- Zone 2
- 20.0 min
- Zone 3
- 5.0 min
- Zone 4
- 0.0 min
- Zone 5
- 0.0 min
- Unclassified
- 0.0 min
- Paused
- 0.0 min
StartEnd · 30.0 min
Timeline preview samples up to 360 evenly spaced points. Totals above use every record; very short changes may not appear in this preview.
2. Cycling · Sep 9, 202625.0 min Z2
40.0 min recorded span · 3.0 min unclassified · 0.0 min explicitly paused. No extrapolation before the first or after the last record.
- Zone 1
- 5.0 min
- Zone 2
- 25.0 min
- Zone 3
- 7.0 min
- Zone 4
- 0.0 min
- Zone 5
- 0.0 min
- Unclassified
- 3.0 min
- Paused
- 0.0 min
StartEnd · 40.0 min
Timeline preview samples up to 360 evenly spaced points. Totals above use every record; very short changes may not appear in this preview.
3. Running · Sep 12, 202635.0 min Z2
50.0 min recorded span · 0.0 min unclassified · 0.0 min explicitly paused. No extrapolation before the first or after the last record.
- Zone 1
- 5.0 min
- Zone 2
- 35.0 min
- Zone 3
- 5.0 min
- Zone 4
- 5.0 min
- Zone 5
- 0.0 min
- Unclassified
- 0.0 min
- Paused
- 0.0 min
StartEnd · 50.0 min
Timeline preview samples up to 360 evenly spaced points. Totals above use every record; very short changes may not appear in this preview.
Recorded first-to-last span; gaps over 30 seconds and track breaks are unclassified. Explicit FIT timer stops are paused. Limits and any weekly goal are user-supplied, not training advice. zone2.yangluotong.top
How the calculation works — and why it can differ from your watch
We analyze the span from the first to last timestamped record. Each reading applies until the next record, only when the gap is at most 30 seconds and both records belong to the same track. Longer gaps, missing or invalid heart rate and TCX track breaks are unclassified. A lower zone limit is inclusive: with a Zone 2 limit of 110 and Zone 3 limit of 130, readings from 110 through 129 fall in Zone 2.
Explicit FIT timer stop events are counted separately as paused. TCX track breaks are not assumed to be pauses. The timeline preview uses at most 360 evenly spaced points; the numeric totals use every record. We do not extrapolate before or after the recorded samples, use a file’s precomputed zone totals, estimate your maximum heart rate or reconstruct missing readings. Different sampling, timer rules and zone settings can produce different totals from another app.
Weeks start Monday in this browser’s time zone. Missing days are not counted as rest days. Repeated or overlapping recordings must be resolved before adding their time. All figures describe recorded data, not fitness improvement or a prescribed training plan.
Format references: FIT activity format · TCX schema · Software credits.
WANT TO SKIP THE FILE EXPORTS?
That’s the next app.
We’re exploring an iPhone app that brings existing workouts into a weekly review. It has not launched yet. Tell us if automatic summaries would save you time.
Need to understand a zone first?
Read the illustrated guide01 / Understand the idea
What does “Zone 2” actually tell me?
See what a formula, a watch and a talk test each describe.
Explore this question 02 / Make sense of effortWhy does an “easy” run feel so hard?
Separate a hard effort from a zone-setting question.
Explore this question 03 / Check your watchWhy do my watch and calculator disagree?
Compare the inputs, inspect the setting, save what you found.
Explore this questionPrefer something to keep? Free PDF and diagrams · Apple Watch settings check
Compare two steady halves
Already have a steady run? Calculate heart-rate drift and speed/HR efficiency, choose the segment and export its inputs.