Rotational Throw Analytics

3D BIOMECHANICS
FROM YOUR PHONE.

Every turn, every position, every frame — from a single video.

For Athletes → · For Coaches →
ThrowSage 3D viewer: photoreal avatar of a hammer thrower mid-turn, hammer, wire and ball path, raw video inset
23.4m/s
Release Speed
38°
Torso Separation
17°
Back Tilt
40°
Orbit Angle

Sample throw — figures from an analysed session.

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For Athletes

Your PRs plateau for a reason.

You feel the throw. You can't see it. Hidden timing errors at turn two, a torso that unwinds early, a back tilt that bleeds radius — they cost meters without ever feeling wrong. ThrowSage makes those errors visible.

  • Is your hip-shoulder separation collapsing before release?
  • Is your back tilt consistent across turns — or dropping?
  • What are your per-turn:
    • single and double support percentages?
    • hammer speeds, acceleration, orbit tilt … and more.
ThrowSage 3D viewer: hammer thrower model mid-turn with the hip-shoulder separation band highlighted in green, a separation-angle graph through the throw, ball path and raw video inset

The dynamic bodymesh coloring reveals shoulder-pelvis separation — something even experienced coaches struggle to quantify from video.

See it from any angle.

Spin your athlete in 3D. See the orbit shape from overhead. Watch the torso lean from behind. Notice the low-point drift from the side. Every frame, every viewpoint — in seconds.

Raw phone video frame with the tracked hammer path drawn over it Overhead view of the 3D ball path around the throwing circle Low side view of the thrower and hammer in 3D

Single support. Double support.

ThrowSage provides clear visualization of SS/DS stages with a change of the throwing circle color — so the per-turn double-support fraction in the report is something you can see, not just read.

3D viewer during single support: the throwing circle interior is shaded grey and the graph cursor sits in an SS span
Single support — circle shaded, graph span marked SS.
3D viewer during double support: the circle interior is clear and the graph cursor sits in a DS span
Double support — circle clear, graph span marked DS.

Compare throws. Track progress.

Stack a throw against your PR. Watch back tilt improve across a training block. Chart release speed against separation, week by week. Every report metric is comparable and trackable — so you can prove the technique change is working.

Per-turn metrics table from a ThrowSage report

For Coaches

Quantify What You Already See

You already spot the flaws. ThrowSage gives you the data to back it up, track it, and prove it's getting better. Objective 3D metrics on every throw, for self review and coaching feedback.

  • Objective 3D analytics for every throw
  • Track athlete progress over weeks and months
  • Share reports with coaches and peers
Top of a ThrowSage report page for an analysed throw
Report plot: hammer trajectory around the throw, every tracked ball position and the last orbit Report plot: hammer speed through the throw, single- and double-support phases shaded Report plot: body and hammer centre-of-mass heights through the throw Report plot: pelvis-thorax separation angle through the throw

Every report includes performance plots, turn metrics and additional guidance.

Coaching Features

Per-Turn Breakdown

Biomechanical metrics for each turn — timing, velocity, body position.

Progress Tracking

Compare throws over weeks and months. See progress, not just snapshots.

Automated Feedback

Set specific issues and metrics to screen for and grade on each throw. Recommend corrective exercises and drills.

Exportable Reports

Share results with athletes, parents, or program administrators.

Compare page: two throws side by side, time-synced

NO HARDWARE. NO LAB. JUST YOUR PHONE.

How It Works

01

Video

Record the throw.

Phone in landscape orientation showing a video frame of a hammer thrower at practice, mid-turn
02

Upload

Upload to the ThrowSage dashboard.

ThrowSage dashboard: a thrower's throws listed as cards with distance, speed, duration and turns, with an Upload Video button
03

Analyze

3D viewer, metrics, coaching flags and reports.

Collage of ThrowSage report pages, metrics tables, throw comparison and analysis plots

Film Anywhere.
Analyze Everything.Coming soon

ThrowSage works with any existing footage. Use the ThrowSage phone app and every shot is optimized automatically — sharper frames, better tracking, cleaner data.

  • Auto FPS selection (60fps when available)
  • Shutter speed tuned for fast rotation — to reduce motion blur
  • Framing guide — athlete and circle both in frame
ThrowSage app camera with the framing guide while lining up a throw

Try for free

Questions

Do I need to install anything?

No. Upload in the browser at throwsage.com. The ThrowSage app is coming soon. More

Can I film with a phone?

Yes — follow the filming guide. The ThrowSage app optimises phone recording settings automatically; multi-camera options are coming soon. Filming guide

How long does it take?

Under 15 minutes today. The target is under 3. What happens after upload

How many throws can I analyse?

Two free analyses to start. More

Is my footage visible to anyone else?

No. Footage is private unless it is shared. More

Can I share my results with my coach?

Yes. Add a coach to the roster or send an invite link; they see the throws that are shared with them. Features