Front knee at contact
How much your knee bends as you land
When your foot touches down, your knee is already slightly bent: it’s the first part of absorbing the landing. Runify Motion measures how much, for each leg, at the exact moment of contact.
Approximate measure: it has a score, but the app reads it with caution and doesn’t suggest exercises.
Initial contact: hip, knee and ankle of the landing leg
How to read the value
0° is a straight leg; the higher the value, the more bent the knee is when your foot touches down.
It’s an approximate measure: the card shows the score with the label “Approximate” and the reason. When the summary of your result mentions it, it does so with caution, with a “Likely…”
What it can mean
A nearly straight knee at contact often goes with a foot that lands ahead of the body; some flexion absorbs the landing.
At contact the knee keypoints are less precise: the value is approximate. Being off by a few frames in finding the contact is enough to shift the angle by a few degrees.
To measure it well
A leg is measured best when it’s on the camera side: for the other one, record a second clip running in the opposite direction.
The moment your foot touches down is very short: record at 60 frames per second or more. Below 60 fps the app flags it and the values at contact become approximate.
What the app suggests
Because it’s approximate, this measure doesn’t lead to suggestions: in the Try this tab the app writes “Nothing to try: this measure is approximate” and the reason.
If the knee is nearly straight and the foot also lands ahead of the body, overstriding is what drives any suggestion.