Asymmetri Motion Tutorial

Step 1.1

The path through a pitch

Start in My Pitches. Choose Record Pitch for a fresh recording, or Import Video for a video already in Photos. The recording button says Record New Pitch when you already have a pitch.

1. Record or import a video.
2. Confirm Camera View and Throwing Arm.
3. Mark the required moments, one exact frame at a time.
4. Choose Analyze Pitch.
5. Open a result and inspect its evidence.
6. Reopen the saved pitch or explore your history.

Step 2.6 · Import

Import an existing video

From My Pitches, choose Import Video and select the original pitching video in Photos. With limited Photos access, include that video in the items the app can access.

If the original is in iCloud, allow it to download and keep enough free storage for the local copy. Wait for import to finish, then open the saved pitch.

If the same Photos item is already imported, Open Existing Pitch returns to that observation. Use as New Pitch intentionally creates a separate observation with its own review history. This is a choice about that Photos item, not a search for all visually similar clips.

Step 3.1

Confirm Camera View

Choose Back View for a camera primarily behind the pitcher, looking toward the target. Choose Side View for a camera beside the pitcher.

An imported video's shape can suggest a starting choice, but portrait or landscape alone does not establish the real camera position. Correct it if needed. Other / Not sure has no supported normal measurement results.

Choosing a view does not calibrate the camera. Each video is analyzed independently; Motion does not combine Back and Side recordings into a 3D view.

Step 3.2

Confirm Throwing Arm

Select Right, Left or Unknown for the pitcher in this video. Use the arm that throws the ball, not the side where it appears on screen.

Unknown is allowed. Results that depend on throwing arm remain unavailable, while independent results can still be analyzed. A profile default helps with new pitches; it does not rewrite the saved choice on older ones.

Step 4.2

Mark Front Foot Contact (FFC)

Look for the earliest visible frame where the lead foot or its footwear contacts the surface after the stride. The lead foot is the foot that lands toward the target.

Use playback and the coarse scrubber to get close. Pause, then use Fine-adjust frame or the previous/next frame controls to inspect nearby samples. Wait for the exact frame to finish loading before confirming.

1. Check the exact-frame number and the image together.
2. Release the slider before using Set Front Foot Contact.
3. For an existing mark, Move Front Foot Contact replaces its location only when you confirm.
4. Use Go To to revisit an existing saved mark without changing it.

Step 5.1

Choose Analyze Pitch

At Results, check the Pitch Mechanics summary and choose Analyze Pitch. Let processing finish, then read the state of each result.

Motion performs pose analysis on device. Eligible measurements can finish independently: one unavailable result does not mean every other result failed. Opening Results alone does not run a new analysis.

Step 5.2 · Back View

Back View: three supported results

These are measurements projected in the video image. Each belongs to a particular marked event.

1. 2D Trunk-Segment Orientation at FFC: the trunk segment relative to image vertical, including the displayed direction.
2. 2D Shoulder-Upper Arm Angle at Ball Release: the included angle formed by the shoulder line and throwing upper arm in the image.
3. 2D Throwing-Side Shoulder-Wrist Orientation at Ball Release: the shoulder-to-wrist direction relative to image vertical.

Image vertical is not ground or gravity vertical. Camera roll and perspective affect these values. They do not establish anatomical joint angles or arm slot.

Step 6.1

Check the frame and its references

Open the result's evidence. Check that the marked event, camera view and intended pitcher match what you meant to analyze.

Inspect the estimated landmarks and reference lines against the visible body. Read the projected value in that image's context. The ankle-span ratio uses two source frames, Setup and FFC; inspect both.

The overlay makes the calculation inspectable. It does not guarantee that a pose estimate is correct. Occlusion, blur, perspective and event selection can change the result.

Step 7.1

Open a saved pitch

Return to My Pitches and use the thumbnail and date to find the observation. Open it to revisit Results, evidence or Review Pitch Inputs. Use the saved mark's Go To action when you want to inspect its frame.

Pitch Date can come from the source or a date you specify. An Added date means when the video entered the app, not necessarily when the pitch was thrown. Keep that distinction in mind when exploring development over time.

Step 8.1

Choose frames or measurements

Review marked frames lets you revisit the exact moments you confirmed, including pitches without a usable measurement. Measurement history uses supported saved results and their evidence.

Step 8.2

Review the same event across pitches

In Review marked frames, choose Front Foot Contact, Ball Release or Setup Reference. Switch between List and Frames. The count tells you how many included pitches have a saved mark for that event.

Open a row or Show frame to inspect the exact saved image. Change the date and context filters when you want a narrower set.

Step 8.3

Choose A, then choose B

Use Choose A and Choose B to select two different pitches with the matching marked event. Replace either side to try another pair. The choices are temporary unless you save the view.

Step 8.4

Inspect the pair and open the originals

Auto, Side by side and Stacked change the layout while preserving each image's proportions. Tap a frame to enlarge it and use Done to return.

Open A or Open B returns to the original saved pitch. Use Back to return to the comparison. Select another matching event when both pitches have the needed mark.

Compare framing before comparing movement. Different camera positions, views or marking decisions can create visual differences. A side-by-side layout does not make the recordings equivalent.

Step 8.5

Choose one measurement

Open Measurement history and choose a supported measure. The same six normal results described in Analyze are available where saved records exist. An empty history can simply mean that no included pitch has an eligible result for that measure.

Step 8.6

Chart: locate an observation

Use Chart to see the included recorded values across pitch dates. Touch a plotted item, or use Previous / Next, to choose an observation.

Read the included count and context before interpreting the pattern. Large histories may be summarized into date bins; inspect the contributors and ranges instead of treating a summary as a new pitch.

Step 8.7

Table and Evidence: inspect the contributors

Use Table for readable values, pitch dates and individual contributors. Open an observation to understand which pitch supplied it.

Use Evidence to inspect the saved annotated image associated with the selected result. Return to the original pitch when you need the video or marked frame. If evidence or a source pitch is unavailable, follow the displayed state rather than assuming the missing item was included.

Step 8.8

Choose the question

The question menu changes what you are investigating. These views describe recorded data; they do not estimate improvement or prescribe targets.

1. History: review individual observations over time.
2. Two pitches: choose an exact A/B pair for one supported measurement.
3. Grouped summary: compare groups using the available grouping, centre and weighting choices.
4. Two periods: compare an earlier date interval with a later one; the earlier period must finish before the later period begins.

A numerical difference requires compatible recorded meanings. If a difference is unavailable, inspect the reason and the individual evidence. Filtering cannot make incompatible records comparable.

Step 8.9

Narrow the recorded context

Open Options and choose Camera View and Throwing side filters. Apply confirms the draft choices; Cancel leaves the current view unchanged.

For summaries, choose the centre, such as mean or median, and weighting. Each Pitch gives each included pitch weight. Each Pitch Date gives dates equal weight. A pitch date is not proof that all pitches came from one session.

Step 8.10

Set the date window

Choose Last 7 days, Last 30 days, Last 90 days, All or Custom. Pitches without a pitch date have a separate choice. Check the date boundaries and the time zone used for the question.

Relative windows move with time. A custom range expresses specific dates. Inspect included pitch dates when a result or comparison seems unexpectedly empty.

Angle differences use degrees. Differences between percentage-valued ankle-span ratios use percentage points. Neither unit makes a difference evidence of improvement.

Step 8.11

Save a question you want to revisit

Use the view controls to Save as New View, give it a useful name, and save. Reopen a Saved View to restore its question, filters, event and exact pitch selections where applicable.

Update an existing view when you intend to replace its saved settings; Save as New keeps a separate view. Results refresh from current history, so a Saved View is not a frozen snapshot. Relative date windows stay relative. If a pinned pitch is no longer usable, select a replacement. Use Saved View actions to rename or delete a saved question; deleting a view does not delete its pitches.

Camera position, event marking and pose estimation affect comparisons. A recorded difference is descriptive; discuss its meaning with a coach.

Step 9.2

Settings, Privacy and Support

Open Settings from My Pitches. About shows the installed app and version. Privacy Policy explains data handling, and Support provides help and contact details.

Pitches and profile information are local to the app. Saving or sharing a copy is a deliberate action; review the destination and the information included.

Step 9.3

Find the version before reporting an issue

In Settings → About, note the version and build shown on your device. Include them with the iPhone model, iOS version, exact message and the steps that led to the problem.