The 28-day progress tracker (printable, guilt not included)

Your target is 4 sessions per week (or 3, if that is your current plan), and any 4 days count. Tuesday missed and Saturday walked is a kept promise, not a repaired failure.

The weekly grid

Tick the days you walk, then write the row total in the target column. The number you actually answer to is the row total, not the chain.

MonTueWedThuFriSatSunTotal
Week 1___ / 4
Week 2___ / 4
Week 3___ / 4
Week 4___ / 4

Two small design choices that do real work:

The monthly check (the part that shows it is working)

Fill this in on day 1 and again on day 28. Gradual change is invisible to memory, which is why progress so often feels like nothing happening; writing four numbers down twice makes it visible.

MeasureDay 1Day 28
Benchmark walk (usual route, honest brisk phases, total time)
Resting heart rate (on waking, averaged over 2 or 3 days)
Round five, out of 10 (how hard the final brisk phase felt)
Stairs test, out of 10 (how your everyday flight feels)

Expect movement in these within a month or two; the headline research numbers took five, and the honest schedule for all of it is in the results timeline.