Running pace over time
four ways to look at pace vs. effort
Every run here has its first 5 minutes excluded (heart rate lags actual effort at the start) and likely sensor dropouts or stale readings across data gaps filtered out; runs without enough clean data are left out entirely rather than shown as an unreliable average.
Efficiency Factor
Speed ÷ average heart rate per run (×100) — a standard way to trend aerobic fitness that isolates how efficiently you're running at whatever effort a given run happened to be, instead of comparing pace only within whichever zone that effort landed in. Higher is more efficient.
Predicted pace at 150 bpm
Each run's own pace-vs-heart-rate relationship, read off at a fixed reference heart rate instead of whichever zone a run happened to spend time in. Lower is faster at the same effort. Only shown for runs where heart rate varied enough within the run to fit a trend.
Efficiency Factor — easy runs only
The same Efficiency Factor as above, limited to steady/easy runs (almost no time above Zone 3) so interval workouts don't mix hard and easy effort into one trend.
Pace by heart-rate zone
Average pace at each HR zone, by period — every 15-second sample from every run is tagged by the zone your heart rate was actually in at that moment, so a run's warmup/tempo/cooldown segments each count toward their own zone instead of averaging into one misleading number. A period/zone combination with under 5 minutes of data is left out of the trend rather than shown as an unreliable average.
Table
Same-route comparison
Runs that start in the same place and cover the same distance are almost certainly the same physical loop, so pace differences here reflect fitness rather than a harder or hillier course. Only routes run at least 7 times are shown; each dot is one run.
Runs per period
Number of runs per month, except Past Month, which shows one bar per week.
Miles per period
Total running mileage per month, except Past Month, which shows one bar per week.
Health trends
daily activity, steps, and vitals over time
Activity rings
From Apple's daily Activity summary.
Steps
Resting heart rate
VO2 max
Workout calendar
every workout, one glance per day
Workout volume
Trailing 12 months, one cell per day — color is total minutes that day, not workout type, so a full year fits in one view. Hover a day for the breakdown.