Running form app for runners with knee pain
Knee pain running form check from a phone clip. See if you reach forward or land stiff, which are often linked with runner's knee. Not a diagnosis.
A running form check can show you whether you land far ahead of your hip with a straight knee, which is often linked with knee pain. It cannot tell you why your knee hurts. That is the honest limit of any video, including Caden. What it can do is show the stride, give you one thing to change, and let you see on video whether it changed.
If your knee hurts on most runs, or hurts when walking or on stairs, see a clinician before you change anything. Bring the clip. A physio will find it useful.
What form problems usually go with knee pain
Runners who search for runner's knee tend to share a few patterns on side-view video. These are patterns, not causes.
- Reaching forward. The foot lands well ahead of the hip with a nearly straight knee. The leg acts as a brake and the impact goes up a stiff leg into the knee. This is overstriding and it is the most common pattern Caden sees in runners with knee complaints.
- Low cadence. Long, slow steps and reaching go together. Under 160 steps per minute at easy pace is common.
- A stiff front knee at midstance. The knee does not bend much as the body passes over the foot. Less bend means less absorption.
- A dropping hip line from the front. On a front or behind view, one hip drops on each step. This is often linked with pain on the outside of the knee, though again a video cannot say it is the cause.
What to film
Film a side view outdoors at easy pace, phone at hip height 6 to 8 metres from your path, 10 to 20 seconds. That is the only view Caden analyses. If a clinician has asked about hip drop or knee tracking, film a separate clip running straight toward or away from the phone for them to review.
Film at a pace and distance that does not hurt. If running at all hurts, do not film. Rest and see a clinician.
See how to film yourself running for framing and light.
What Caden shows you
From the side view, a form score and six dials. The three that matter for knee pain:
- Where your foot lands. How far ahead of your hip the foot lands, as a fraction of leg length. The note "Reaching too far ahead" is the flag.
- Knee bend on landing. Knee flexion at midstance in degrees. A low score means the knee stays straight.
- Cadence. Steps per minute.
Breakpoints freeze the foot strike frame with a skeleton overlay and the landing ankle circled. If the circle sits well ahead of the hip, that is the reach. The coach's tip gives one cue per dial.
A sample 4-week plan
Caden builds a 4 or 8 week plan on the Exercises tab from the lowest dials, three short sessions a week at a session length you choose. When foot landing is lowest, it looks like this. Stop any exercise that hurts the knee.
Weeks 1 and 2: land closer.
- A-march, 3 × 30 seconds.
- Glute bridge, 3 × 10.
- Slow calf raises, 3 × 10.
- Single-leg balance, 2 × 30 seconds each side.
- On easy runs, use the cue for 30 seconds, four times.
Short, quiet steps.
Weeks 3 and 4: hold it a little faster.
- A-skip, 3 × 20 metres, if pain free.
- Quick-feet strides, 3 × 20 seconds at cadence plus 5 percent.
- Split squat, 3 × 8 each side, short range if the knee complains.
- Hip flexor stretch, 2 × 30 seconds each side.
Then film again and open Before and after in Stats. The goal is a shorter landing reach and a higher cadence on video. Whether the knee feels better is a separate question for you and your clinician.
What Caden will not do for a runner with knee pain
It will not diagnose. Runner's knee, patellar tendon pain and iliotibial band pain can all sit under one search phrase and a video cannot tell them apart.
It will not promise that a form change stops the pain. It may help. Shorter landing reach is often linked with less load at the knee. That is as far as a video can go.
It cannot see inside the joint, measure force or see pronation. It sees a 2D outline from a phone.
How to do it in Caden
- Open Caden, tap Run a new analysis and set up a side-on shot.
- Prop the phone at hip height 6 to 8 metres from your path. Run past at an easy, pain-free pace for 10 to 20 seconds.
- On the results screen, read the Where your foot lands and Knee bend on landing dials and the cadence number.
- Tap Breakpoints, then Foot strike. Check where the circled ankle sits compared with the hip.
- Open the Exercises tab and do the plan. Re-film in week 4 and open Before and after in Stats.
FAQ
Can a running form app tell me why my knee hurts?
No. A video shows where your foot lands and how your body moves. It cannot see the cause of pain. Use the clip to spot a pattern and take it to a clinician.
Is overstriding linked with runner's knee?
foot landing far ahead of the hip with a straight knee is often linked with knee complaints. Many runners with knee pain overstride. That is a pattern on video, not proof of a cause.
Should I keep running with knee pain while I fix my form?
Only if a clinician says so and the runs are pain free. Form drills on rest days do not need running. The cue on easy runs can wait until the knee allows it.
Will a higher cadence help my knee?
A cadence rise of about 5 percent shortens the stride and often brings the foot under the hip. That may help. Confirm the change on video rather than on a watch.