Plantar fasciitis is heel or arch pain that's worst with the first
steps in the morning, eases as you warm up, and returns after harder
training blocks. It's among the most commonly recorded running
injuries (Kakouris et al., 2021).
The plantar fascia is a thick band under the foot that tensions on
every landing and push-off. It gets irritated when the stride asks
it to absorb more, for longer, than it can recover from. Shoes and
insoles change the interface between your foot and the ground; they
don't change how long and how hard each contact is.
This page covers what GaitLab Coach looks for when you flag plantar
fasciitis before an analysis.
A foot that lands well ahead of the hips has to catch the body and
then roll through a long stance before push-off. That means more
time under load for the fascia on every stride, and more braking
force arriving through the heel.
Cadence is the lever that changes both. At a higher step rate the
stride shortens, the foot lands closer to the body, and ground
contact gets shorter. A 5–10% increase reduces ground reaction force
and loading rate without hurting running economy (Sports Health, 2025), and shorter strides are consistently tied to lower impact forces
(stride length and impact review).
Foot strike is one input, not the answer. A heel landing under the
hips is ordinary; a heel landing far in front with a straight knee
is the version that loads the heel. Forcing a forefoot strike shifts
load to the calf and Achilles, which for a fascia that's already
irritated is a trade, not a fix.
Sharp heel pain with the first steps out of bed that eases after a
few minutes
Pain that rises after a jump in mileage, speed, or time on hard
surfaces
A pattern that outlasts new shoes and insoles
What the video shows
Contact time
A foot that lingers before push-off is spending longer under
load on every stride.
Landing position
A foot well ahead of the hip line at first contact adds braking
and lengthens stance.
Cadence
Measured on-device from the video's motion signal. Raising it
from your own baseline shortens contact time.
Push-off
A stride that rolls slowly through the foot rather than
springing off it tends to go with a long, reaching landing.
What GaitLab Coach does with it
Flag plantar fasciitis before recording and the analysis weights its
findings toward contact time and landing position, and it won't push
you toward a forefoot strike. The full report explains each finding
and suggests a cue and drill to practice.
The 4-week plan for a plantar case typically leads with a cadence
cue and a landing-position drill, adds calf and foot strength work
that's gentle on the fascia, and keeps volume flat while the pattern
changes. Focused programs outperform a list of simultaneous cues (Bramah et al., JOSPT 2022).
Findings ranked by how much they change load on the heel, not by
how visible they are
Drills screened against the injury you flagged
A re-test after the plan that compares contact time and landing
position to your baseline clip
When form isn't the culprit
Plantar heel pain is often about training load, footwear changes, or
a lot of time standing on hard floors, with an ordinary stride. Form
work doesn't undo a rapid build. Heel pain with numbness or
tingling, pain that's sharp at rest, or a heel that's swollen or
bruised needs a clinician before any drill work. GaitLab Coach flags
movement patterns linked to overuse risk; it can't examine the foot.
Can a phone video help with plantar fasciitis in runners?
It can show how long your foot spends on the ground, where it
lands relative to your hips, and your cadence. Those are the
coachable variables that change load on the heel. It can't
measure tissue load or tell you why the fascia is irritated.
Is plantar heel pain just about foot strike?
No. Contact time, landing position, and cadence matter more than
which part of the foot touches first. A forced forefoot strike
moves load to the calf and Achilles.
How does flagging plantar fasciitis change the plan?
The findings are ranked by heel load and the drill list is
screened for that injury. You'll get a cadence cue and landing
drills before anything that adds calf or forefoot load.
Use this guide to understand the movement patterns discussed in a
report. In GaitLab, select the relevant injury context before your
analysis, or skip injury selection for general form feedback.
Start with free form highlights and slow-motion replay. Ranked
findings and the 4-week drill plan require the optional Premium
unlock. A video-based form assessment cannot confirm the cause of
pain.
Record your run, flag plantar fasciitis, and get the contact and
loading patterns ranked in order. Free to start. The full report, with
the 1–10 score, ranked findings, and 4-week plan, is a one-time $4.99
unlock.