A side view of easy running is the strongest thing a phone can give us. It reads your rhythm well, it reads where your foot lands relative to your hips reasonably well, and it reads angles in this one plane with real caveats.
- Goal Run more efficiently
- Effort Easy · Easy conversational effort
- Ground Paved path
- Felt Fresh
- Shoes Everyday trainer, about six months old
Bring your landing closer underneath you.
Hold this while you run“Quick, quiet steps.”
Why this one first
Across the analyzed cycles, the foot lands consistently ahead of the hip with the lower leg already reaching forward, and that pattern repeats rather than appearing once. It is also the change most likely to move on its own if your step rate lifts slightly, which makes it the cheapest thing to try first.
How it connects to run more efficiently
You said you want the same easy pace to feel like less work. Landing nearer your hips is the change most often associated with less braking at each step, which is a plausible route to that feeling. Whether it works for you is what the retest is for.
What was considered and set aside
Trunk lean and how much you rise and fall were both reviewed and set aside: this clip was filmed from a propped phone, so both carry too much camera movement to act on. The difference between alternating steps was also set aside, because a single side view cannot say which leg it belongs to.
The frames this was read from
These are the moments the analysis picked out of your clip. The frames the priority actually cites are marked and come first. Nothing above was decided anywhere other than here.
Landing
Where the foot meets the ground relative to your hip.
- Stride 2
- Time in clip 1.85 s
- Body tracking quality 94% It measures detector confidence, not whether the detector was correct.
- ■ Joints this priority rests on
- ■ Trunk reference
- ■ Everything else tracked
- ┆ Vertical line through your hips
- What the frame shows
- At the moment of a foot contact, the ankle sits well ahead of the hip, and the lower leg is angled forward rather than close to upright.
- What it may mean
- A foot that lands further ahead of the hips is often described as adding a braking moment at each step. That relationship is general, and this clip cannot measure force, so treat it as a reason to try the change rather than a finding about you.
- Measurement behind it
- Foot landing position
How much this clip can carry
Filmed on paved path. Watch for gradient. Even a gentle slope shifts trunk lean and contact time.
The biggest limitation of this clip: The phone was propped rather than mounted, so anything that depends on how much your body rises and falls carries the camera's small movements as if they were yours.
- Strides analyzed
- 7Fewer strides means any average below is a weaker description of your normal running.
- Frames sampled
- 214Positions read from the clip, one every 33 ms.
- Timing resolution
- 33 msNothing shorter than this interval is measurable, no matter how confident another number looks.
- Camera Side view, camera on your right
- Held Propped on something solid
You confirmed this angle when you filmed, and the tracked joints agree with it.
Problems worth knowing about
- The phone was propped rather than mounted, so vertical movement and trunk lean carry lower confidence than the timing values.
- The camera-side wrist left the frame repeatedly, which is why arm swing range could not be measured at all.
What this angle can show
- Step timing, rhythm, and how consistent your cycles are
- Where the foot lands relative to your hips, scaled to your own leg
- Trunk and lower-leg angles in the side plane
- How far the knee folds as the leg swings through
What it cannot show
- Which side of your body anything is happening on
- Whether your feet or knees drift inward or outward
- Which part of the foot touches down first
- Any force, load, or impact on your joints
- Anything about injury, pain, or tissue
To make the next clip stronger: Next time, stand the phone on something solid, step back until a full body length of clear ground sits either side of you, and film the same easy effort.
The numbers behind the change
Only the values the priority rests on are shown here. The rest were computed and are kept below, unedited, so nothing is hidden — but a page of numbers is not the point of this report.
Foot landing position
ProxyHow far in front of your hip the foot lands, scaled to your own leg length so camera distance does not matter.
18.4% of leg length ahead of your hip
Plausible band: 15.8 to 21.0 % of leg length ahead of your hip. Treat anything inside that range as the same value.
What it cannot tell you: The hip stands in for your centre of mass, and a camera even slightly off square to your path stretches or shrinks this distance.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions, scaled to your own body.
Method: Horizontal distance from the ankle landmark to the midpoint of the hip landmarks at the contact frame, divided by the hip-to-ankle length measured on the same frame.
Always true of this measurement: The hip is a stand-in for your centre of mass, and any camera angle that is not square to your path inflates or shrinks this distance.
Lower-leg angle at landing
ProxyWhether the shin is vertical, angled forward, or angled back at the moment the foot lands.
9.7° from vertical in the video frame
Plausible band: 7.5 to 11.9 ° from vertical in the video frame. Treat anything inside that range as the same value.
What it cannot tell you: Measured against the video frame, and it says nothing about which part of the foot touches down first.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions in the image.
Method: Angle between image vertical and the knee-to-ankle line on the contact-side leg at the detected contact frame.
Always true of this measurement: Like trunk lean it is measured against the video frame rather than gravity, and it says nothing about which part of the foot lands first.
Every other value computed from this clip (16)
Cadence
MeasuredHow many foot contacts you make per minute across the analyzed strides.
166steps/min
Plausible band: 164 to 168 steps/min. Treat anything inside that range as the same value.
What it cannot tell you: Counted over a handful of seconds of easy running, so it describes this clip rather than your whole run.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Counted from foot-contact events and frame timestamps.
Method: Foot-contact events are detected from the vertical and horizontal motion of the ankle landmarks, then converted to steps per minute using the sampled frame timestamps.
Always true of this measurement: It is the cadence of this clip at this pace only, not your cadence at every pace.
Stride time
MeasuredThe average time between two contacts of the same foot.
0.72s
Plausible band: 0.69 to 0.75 s. Treat anything inside that range as the same value.
What it cannot tell you: Two sampled frames of uncertainty sit inside every interval at this clip's frame rate.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Counted from foot-contact events and frame timestamps.
Method: Mean interval between successive same-side foot-contact events across all complete cycles.
Always true of this measurement: Resolution is limited by the clip's frame rate, so short strides carry proportionally more timing error.
Strides analyzed
MeasuredHow many complete gait cycles this report is based on.
7strides
No band can be justified for this value, so read the figure as approximate rather than exact.
What it cannot tell you: Seven cycles is enough for a first read and not enough to describe a whole run.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Counted from foot-contact events and frame timestamps.
Method: Count of complete contact-to-same-side-contact cycles that passed the visibility gate.
Always true of this measurement: Fewer strides means any average below is a weaker description of your normal running.
Ground contact time
ProxyRoughly how long each foot appears to stay down, from the frames where the foot stops moving forward.
251ms
Plausible band: 218 to 284 ms. Treat anything inside that range as the same value.
What it cannot tell you: The frames cannot see the instant the foot touches or leaves the ground, so read this as a band, not a figure.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Counted from foot-contact events and frame timestamps.
Method: Frames between the detected contact event and the detected toe-off event for each step, averaged. Reported only when the sampling interval is short enough to resolve it.
Always true of this measurement: Video frames cannot see the instant the foot touches or leaves the ground, so this is accurate only to about one frame in each direction.
Flight time
ProxyRoughly how long you appear to be off the ground between steps.
110ms
Plausible band: 77 to 143 ms. Treat anything inside that range as the same value.
What it cannot tell you: It inherits the same frame-level uncertainty as ground contact, and the shorter the interval the more that matters.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Counted from foot-contact events and frame timestamps.
Method: Interval between a detected toe-off and the next detected contact, averaged across steps.
Always true of this measurement: It inherits the same one-frame uncertainty as ground contact time, and both feet can be briefly ambiguous.
Time on the ground
ProxyThe share of each step spent in contact rather than in the air.
70% of each step
Plausible band: 64 to 76 % of each step. Treat anything inside that range as the same value.
What it cannot tell you: A ratio of two frame-limited estimates, so the band around it is wide enough to cover most of what you would call normal.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Counted from foot-contact events and frame timestamps.
Method: Contact time divided by the sum of contact and flight time for the same step.
Always true of this measurement: It is a ratio of two frame-limited estimates, so treat it as a broad band rather than an exact percentage.
Trunk lean
ProxyHow far your shoulder-to-hip line tips forward or back relative to the image's vertical, averaged over mid-stance.
3.2° from vertical in the video frame
Plausible band: 1.7 to 4.7 ° from vertical in the video frame. Treat anything inside that range as the same value.
What it cannot tell you: Measured against the video frame rather than gravity, so a tilted phone shifts every reading the same way.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions in the image.
Method: Angle between image vertical and the line from the shoulder midpoint to the hip midpoint, sampled at mid-stance of each analyzed step and averaged.
Always true of this measurement: It is measured against the video frame, not against gravity, so a tilted phone or a sloped treadmill shifts every reading by the same amount.
Knee bend at landing
ProxyHow bent the landing knee appears at the contact frame, where 0° would be a completely straight leg.
14.6° of bend
Plausible band: 11.5 to 17.7 ° of bend. Treat anything inside that range as the same value.
What it cannot tell you: A flat image flattens any rotation out of the side plane, so the real joint angle is larger than what the camera sees.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions in the image.
Method: 180° minus the hip-knee-ankle angle on the contact-side leg, measured in the image plane at the detected contact frame.
Always true of this measurement: A flat 2D image compresses any rotation out of the side plane, so the true joint angle is larger than what the camera can see.
Peak heel recovery
Low confidenceThe most the knee folds while the leg swings through, which tracks how high the heel comes toward the hip.
94.8° of bend
Plausible band: 85.4 to 104.2 ° of bend. Treat anything inside that range as the same value.
Why this is limited: The swinging leg was hidden behind the near leg for part of three of the seven cycles, so this rests on fewer frames than the rest of the report.
What it cannot tell you: Only the camera-side leg reads reliably, and here even that leg was intermittently occluded.
How this number was worked out
Low confidence. Computed, but a quality check on this clip failed. Read the reason before you act on it.
Source: Measured from joint positions in the image.
Method: Maximum image-plane knee flexion between toe-off and the following contact, taken on the leg with the higher landmark visibility.
Always true of this measurement: The far leg is often partly hidden behind the near leg, so this reads reliably only for the camera-side leg.
Vertical movement
ProxyHow much your hips rise and fall each step, scaled to your own height in the frame.
4.90% of your standing height
Plausible band: 4.10 to 5.70 % of your standing height. Treat anything inside that range as the same value.
What it cannot tell you: Any camera movement is measured as if it were yours, and this clip was filmed from a propped phone rather than a tripod.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions, scaled to your own body.
Method: Peak-to-trough range of the hip-midpoint vertical coordinate within each stride, divided by the head-to-ankle height measured on the same frames.
Always true of this measurement: Camera shake, a hand-held phone, or a runner drifting toward or away from the lens all add movement that is not yours.
Elbow angle
ProxyThe average bend in the camera-side elbow across the analyzed strides.
87.5° of bend
Plausible band: 83.0 to 92.0 ° of bend. Treat anything inside that range as the same value.
What it cannot tell you: The far arm is hidden, so this describes one arm and cannot compare your two sides.
How this number was worked out
Proxy. A stand-in for something a single camera cannot measure directly. Useful for watching your own clips change over time; not a laboratory value.
Source: Measured from joint positions in the image.
Method: Mean shoulder-elbow-wrist angle on the arm with the higher landmark visibility, averaged over all analyzed frames.
Always true of this measurement: The far arm is usually hidden, so this describes one arm and cannot compare the two.
Arm swing range
Not measurableHow far the camera-side hand travels front to back during a stride, scaled to your height in the frame.
Not measurable in this clip
Why this is limited: The camera-side wrist fell below the visibility gate through most of the clip, so no range could be measured. A wider frame and a plain background would fix it.
What it cannot tell you: Even when it is available, a side view cannot see whether the hands cross the midline.
How this number was worked out
Not measurable. This clip could not support the value, so no number is shown and none was estimated.
Source: Measured from joint positions, scaled to your own body.
Method: Range of the camera-side wrist's horizontal position relative to the hip midpoint within a stride, divided by measured stature.
Always true of this measurement: A side view cannot see whether the hands cross the midline, which is the more common arm-carriage issue.
Step-to-step difference
Not measurableHow much alternating steps differ from each other in contact timing.
Not measurable in this clip
Why this is limited: Comparing one step against the next needs a clock finer than 20 ms, and this clip resolves 33 ms between frames. At that resolution the smallest difference the video could show is larger than any difference worth acting on, so no value is published. A slow-motion recording measures this.
What it cannot tell you: One side view cannot tell which leg is which, so this is a difference between alternating steps and must not be read as a left-versus-right finding.
How this number was worked out
Not measurable. This clip could not support the value, so no number is shown and none was estimated.
Source: Calculated across the analyzed strides.
Method: Absolute difference between the means of odd-numbered and even-numbered step contact times, divided by their combined mean.
Always true of this measurement: A single side view cannot reliably tell which side is which, so this is an alternating-step difference and must not be read as a left/right diagnosis.
Rhythm consistency
MeasuredHow much your step timing varies across the analyzed strides.
3.4% spread
Plausible band: 2.3 to 4.5 % spread. Treat anything inside that range as the same value.
What it cannot tell you: A short clip can look steadier than a full run simply because there was less time to drift.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Calculated across the analyzed strides.
Method: Standard deviation of step intervals divided by their mean, expressed as a percentage.
Always true of this measurement: A short clip can look steadier than a full run simply because there was less time to drift.
Body tracking quality
MeasuredHow confidently the pose detector saw the joints this report depends on.
91%
No band can be justified for this value, so read the figure as approximate rather than exact.
What it cannot tell you: This is how confident the detector was, not whether the detector was right.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Reported by the pose detector, not a measurement of your running.
Method: Mean reported visibility of the hip, knee, ankle, shoulder, elbow, and wrist landmarks across analyzed frames.
Always true of this measurement: It measures detector confidence, not whether the detector was correct.
Timing resolution
MeasuredThe shortest time difference this clip can resolve, which sets the error bar on every timing number.
33ms
No band can be justified for this value, so read the figure as approximate rather than exact.
What it cannot tell you: Nothing shorter than this interval is measurable in this clip, however confident another number looks.
How this number was worked out
Measured. Computed directly from evidence this clip can support at the precision shown.
Source: Read from the clip itself, not from your movement.
Method: The interval between sampled frames, taken from the clip's effective frame rate and the analyzer's sampling rate.
Always true of this measurement: Nothing shorter than this interval is measurable, no matter how confident another number looks.
Metronome pickups
To let a slightly quicker step rate shorten your reach for you, instead of trying to place the foot by hand.
- Set a metronome or a song a touch faster than your usual easy rhythm, so it feels like a nudge rather than a sprint.
- Run at your normal easy effort and match your steps to the beat, keeping the same speed rather than chasing a faster pace.
- Let your steps land where they want to land. Do not aim your foot, and do not shorten your stride on purpose.
How much, and when
- How often
- Twice a week
- How much
- Four blocks of thirty seconds, with a full easy minute between them
- Where in the run
- Inside an easy run, after you are properly warm, never as the first thing you do
- How to tell it is working
- You should hear the difference before you feel it. Quieter, shorter-sounding contacts at the same effort mean it is doing what it is meant to. Working harder to hold the beat means it is not.
Stop for the day if your breathing climbs, if your steps start to sound heavier rather than lighter, or if anything begins to ache. Ending a session early costs you nothing here.
How to find out whether it worked
- When
- After about two weeks of the drill, once it stops feeling like a task
- At the same effort
- Film the same easy effort you filmed this time, on the same kind of ground, at roughly the same point in a run. If you record a harder effort, the numbers will move whether or not your form changed, and we will not be able to tell the two apart.
- What would count as a real change
- Given how much uncertainty this clip carries, only a shift clearly wider than the band shown next to each value counts as a change. Anything inside that band is noise, and the retest will say so rather than congratulate you.
- What would mean this is the wrong lever
- If the landing distance has not moved at all, or it has moved while your rhythm became less steady, the step-rate route is not the right lever for you and the next report should look elsewhere rather than prescribe more of the same.
What your next clip will be compared against
Where this sits against your earlier clips
Compared with your earlier easy-pace clip, the landing distance has moved in the direction the drill was aiming for, and it has moved by more than the uncertainty in either report. Your step rate is a little higher and your rhythm is at least as steady as before.
Both clips were filmed at an easy effort on a paved path, from a side view, at the same frame rate, and both cleared the same quality gates. That is what makes the comparison worth making. A clip from a harder session would not have been compared at all.
Why effort is the axis: Easy-pace form is the most repeatable baseline and the best band for tracking change over weeks.
What this report cannot tell you
- Everything here comes from one clip lasting a few seconds. Running changes with distance, fatigue, terrain, and shoes, none of which this clip saw.
- A side view cannot tell your left from your right. Nothing in this report is a left-versus-right finding, even where it sounds like one.
- The report describes movement only. It cannot see force or load, it knows nothing about your tissue, and the scope notice above states what that rules out.
- There is no reference form to compare you against. The priority is a change worth testing on you, not a gap between you and a correct shape.
- Which side of your body anything is happening on
- Whether your feet or knees drift inward or outward
- Which part of the foot touches down first
- Any force, load, or impact on your joints
- Anything about injury, pain, or tissue
This report describes what is visible in one clip, at one pace, from one camera angle. It is not a medical or injury assessment and it does not diagnose anything. There is no single correct running form, so nothing here is a standard you are failing to meet. Treat it as one more input next to how you feel and anyone who coaches you in person.