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DynaSled

Sport happens horizontally.

The world's first force-sensing push–pull sled. Stride-by-stride horizontal force at 100 Hz, live to iPad.

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DynaSled
100 Hz

Sample Rate

1500 N337 lbf

Max Force

17 kg37.5 lb

Sled Weight

<40 ms

Latency to iPad

DynaSled

Force plates only see
half the picture.

Traditional force plates measure vertical ground reaction force. But sprinting, tackling, and change of direction are driven by horizontal force — the component that actually moves an athlete forward.

DynaSled captures what they miss: stride-by-stride horizontal force, velocity, and left–right asymmetry — all on the surface where performance actually happens.

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DynaSled in action
Push & Pull

Not all sled work is equal.

Push drills

When an athlete pushes a loaded sled, the closed loop system between sled, arms, torso and legs creates a preload on the push-bar. This force preloads the DynaSensor with a percentage of body weight, which results in lower fidelity in the data you would see in a tethered pull drill. The result is smaller force excursions and a compressed dynamic range — the sensor sees less of what you're actually interested in.

DynaSled can record push sessions, but it is not designed for heavy push sled work. If maximum load is your goal, a standard sled will serve you better.

Push drill force trace — note the elevated baseline caused by body-weight preload on the DynaSensor

Push drill — sustained baseline above zero due to closed-loop preload. Peak: 216 N · Avg: 105 N

Pull drills — where DynaSled excels

Pull drills remove the preload problem entirely. Without body weight bearing down on the sled, the sensor captures the full horizontal force profile — greater dynamic range, sharper impulse peaks, and far more pronounced left–right asymmetry.

This is where DynaSled delivers its most actionable data: asymmetry that would be invisible on a force plate, and a force–velocity profile that reflects exactly what the athlete produces stride by stride. The image below is a composite of left and right leg forces and how the sled friction and inertia reacts against the athlete.

Pull drill force trace — clean stride-by-stride peaks starting from zero baseline

Pull drill — signal returns to zero between strides. Clean asymmetry visible. Peak: 266 N · Avg: 34 N

Clearance Testing

Return to Sport Clearance Testing

DynaSled gives coaches objective data for one of the hardest decisions in sport: when an injured athlete is ready to return to full training and competition.

The problem with return to sport decisions is subjectivity. A coach watches an athlete sprint and judges by eye whether movement looks symmetrical. DynaSled removes the guesswork. Stride-by-stride bilateral force testing shows exactly how much force each leg is producing and whether the gap has closed enough to clear the athlete for return to sport.

The threshold commonly used in return to sport clearance protocols is a limb symmetry index (LSI) deficit of less than 10%. DynaSled shows this live in Syncro, stride by stride, during every session.

Post-ACL return to sprint

Track bilateral force output across the rehab timeline. Leg asymmetry testing at every session replaces subjective sprint observation with numbers you can act on.

Hamstring strain load progression

Monitor how each limb responds as resisted sprint load increases. Return to sport force testing confirms the injured leg is producing force at the required threshold before you progress.

Weekly asymmetry tracking during rehab

Run a short pull protocol each week. Longitudinal LSI data in Swift Labs shows the trend, not just the snapshot, so return to sport clearance decisions are backed by evidence.

Why DynaSled

Every detail. Engineered for sport.

Sensor

DynaSensor™ built in

A precision load cell captures every push and pull at 100 Hz with 0.3 N resolution. Internal gyroscopes and accelerometers deliver accurate velocity measurement stride by stride. No external hardware. No cables to trip over.

Connectivity

Live to iPad. Always.

Bluetooth 5.2 LE streams force data to the Syncro app with less than 40 ms latency at up to 30 m range — from the turf, track, or court.

Durability

Built for the field

Powder-coated steel chassis rated to handle up to 75 kg of additional plates. 12-hour battery life, USB-C recharge in 3–4 hours. Built to live in a kit room and work on any surface.

Analytics

Stride-by-stride insight

See peak force, impulse, and left–right asymmetry on-screen in real time, stride by stride. Export to Swift Labs for longitudinal trend analysis and team reporting.

Software

Your data. From field
to insight.

DynaSled data collection is done with the Syncro iPad app — the same app that collects data from our G4 Timing Gates and EzeJump — full live data, stride-by-stride graphs, and session export. Your Swift Labs login unlocks it from day one.

A Year 1 Swift Labs Team subscription is billed with your hardware at checkout. It unlocks longitudinal reporting, team dashboards, asymmetry trend alerts, and AI-driven readiness flags — everything you need to turn raw numbers into training decisions.

✓
Syncro App — Your live field interface — unlocked via Swift Labs login
✓
Swift Labs Team — Mandatory Year 1 — billed with hardware at checkout
✓
Swift Labs Core — Auto-downgrade after Year 1 — data storage, free forever

Syncro App

Full data. Always.

Year 1 Team subscription billed with your hardware at checkout.

Swift Labs

From data to decisions.

Reporting, trends, AI insights. For teams that want more.

Ask about Swift Labs
Specifications

Technical details

Chassis materialPowder-coated steel
Sled dimensions880 × 430 × 95 mm (34.6 × 16.9 × 3.7 in) — body only, excl. handle & weight pipe
Packed dimensions1220 × 550 × 230 mm (48.0 × 21.7 × 9.1 in) — incl. carry case
Sled weight17 kg (37.5 lb)
Max additional load75 kg (165 lb) — standard plates
Force range0 – 1500 N
Force resolution0.3 N
Sample rate100 Hz
IMU velocity range0 – 12 m/s
Display latency< 40 ms
Wireless protocolBluetooth 5.2 LE
Range30 m (line of sight)
Battery life12 hours
Charge time3–4 hours (USB-C)
Sensor pod weight180 g
App compatibilitySyncro (iPadOS 17+)
ComplianceRoHS · CE · FCC
Warranty24 months
Pricing

Global pricing. Delivered to your door.

Hardware prices shown are ex-works. Shipping, taxes and bank fees not included. Import tariffs (where applicable) are listed as a transparent line item in your quote.

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Ready to see the data?

Book a demo and we'll walk you through a live session — real force data, real asymmetry, your questions answered.

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