The guide · topic
Measuring progress
Recovery after ACL reconstruction is gated by numbers rather than weeks, and most of them can be tracked at home. These articles cover the measurements that matter, from knee angles to the strength and hop comparisons used before running and sport, and how to record them so the trend is visible.
5 articles
Measuring progress · Return to sport
Hop tests after ACL surgery
The four single-leg hop tests used after ACL reconstruction, how the limb symmetry index is worked out, and what a symmetrical hop distance can hide.
Measuring progress · Strength
Limb symmetry index after ACL surgery
What the limb symmetry index measures, where the 90 per cent threshold came from, and why a good score can flatter a recovering knee.
Mobility · Measuring progress
How to measure knee extension at home
Why zero degrees is the wrong target, the two ways extension is measured, and how much of a day-to-day change is real rather than noise.
Using the app · Measuring progress
How to choose an ACL rehab app
What to look for before you commit: criteria-based progression, range-of-motion and pain logging, a programme your physio can change, and where your data goes.
Mobility · Measuring progress
How to measure knee flexion at home with your phone
What flexion and extension mean, why a phone's sensors are good enough to track them between physio visits, and how to take a reading you can trust.