HY CoachTry your own video ↗CASE STUDY · JANE
Jane’s movement,
made visible.
Two findings in the reviewed strokes
- Torso finishes nearly horizontal
- High starting reach
5.7-second clip · 2 complete repetitions reviewed
FINDING 01 / 02
Torso finishes nearly horizontal
Jane’s torso is nearly level at the finish in 2 of 2 complete repetitions.
What the analysis sees
The finish is the bottom turnaround of the hands, immediately before recovery.
This describes the visible torso position at that moment.
The torso is diagonal in other parts of the strokes.
Those positions do not replace the assessment at each actual hand bottom turnaround.
The original images support a qualitative position assessment, not calibrated anatomical measurements.
The far-side landmarks overlap the nearer side.
Observed in reviewed window 0.00–5.65s; no efficiency measurement.
Measurement details
Approximately 5° below horizontal at the finish, visible in 2 of 2 complete repetitions.
Some matching finishes were visible but their angles could not be measured reliably.
Reliable finish-angle measurements: 1 of 2 complete repetitions. The displayed angle is the median of 1 measured matching finishes. 0 finishes could not be assessed visually.
Projected 2D hip-to-shoulder angle relative to image horizontal (0° horizontal; 90° upright). Camera tilt and perspective can change this value. The near-horizontal description uses a 15° tolerance after rounding each finish to the displayed five-degree precision, not a target or a threshold for incorrect technique.
Cited moments
Angles are shown only where they could be measured reliably. Other frames provide visual context.
Torso ≈5° below horizontal · approximate
FINDING 02 / 02
High starting reach
At both top endpoints, the hands are clearly above the crown and the nearer elbow is visibly open, with the arm almost straight.
Optional cue to try Jane can start with her hands just above eye level and keep a comfortable bend in her elbows.
What the analysis sees
The repeated overhead endpoints and visibly open nearer elbow support the catalogue's high-reach pattern.
The hands remain forward of the head and the farther elbow has some bend.
An above-eye start alone would not support this finding; the open nearer elbow and clearly overhead endpoint are also visible.
Arm overlap limits comparison between sides.
Comfort and training intent cannot be established from images.
Observed in reviewed window 0.00–5.65s; no efficiency measurement.
Measurement details
Wrist above eye at the start: 34% of reference torso length. Starting elbow angle: 180°. Measurements available from 2 of 2 cited strokes.
This is a visible position observation, not a confirmed technique fault. The optional cue is something to explore with a coach, rather than a correction established by these measurements.
Projected 2D. Joint angles: 180° straight. Torso: degrees above image horizontal. Distances: fixed reference torso length.
Cited moments
Angles are shown only where they could be measured reliably. Other frames provide visual context.
Elbow ≈180° · approximate
Elbow ≈110° · approximate
Elbow ≈100° · approximate
Elbow ≈110° · approximate
MOVEMENT & ANGLES
How the angles change through the clip.
Projected 2D joint angles from the saved analysis. Gaps represent unavailable measurements.
Where the findings appear
Other observations
Jane’s knees visibly bend as her torso moves down in both complete strokes.
The head is tucked forward at the bottom of both complete strokes.
This visible posture is outside the backward-head-tipping definition.
Hair and overlapping arms limit precise facial-landmark assessment.