The Grand Velocity Machine: An All-in-One Isokinetic Dynamometer
When a clinic asks “Why Grand?”, the answer is that the Grand Velocity Machine is designed to be the most complete rehabilitation and testing system in the Velocity Isokinetics range. Formerly known as the IsoMed, it is a multi-functional, all-in-one unit built to take a client from assessment through monitoring to rehabilitation — on a single platform.
It is pitched as a one-stop, multi-joint rehabilitation machine, engineered for rehabilitation professionals who need reliable, repeatable data alongside controlled, low-impact exercise.
Why “Grand”? The Flagship Clinical System
The “Grand” in the name reflects the machine’s scope. Where other units in the range specialise — a knee here, a hip there — the Grand Velocity Machine is built to do it all. It covers hip, shoulder, elbow, back, ankle and wrist, with a dedicated focus on unilateral knee function through an integrated Range Limiter device.
That breadth is what makes it suited to busy clinics, sports-science labs and high-performance facilities that want one system — rather than a wall of single-purpose machines — to assess and treat the whole body.
Three Modalities in One: Isokinetic, Isometric and Isotonic
Most rehabilitation equipment locks you into a single mode of resistance. The Grand Velocity Machine is an all-in-one isokinetic, isometric and isotonic unit, which means a practitioner can:
- Run isokinetic tests at a controlled constant speed for objective strength and torque data.
- Apply isometric protocols to load a joint at a fixed angle without movement.
- Use isotonic options for more conventional concentric and eccentric conditioning.
Switching between modalities on one platform keeps assessments consistent and saves floor space. For a deeper look at how isokinetic resistance compares to isotonic and pneumatic systems, see our guide: Isokinetic vs Isotonic vs Pneumatic.
Dual Motors for Unilateral and Bilateral Testing
This is where the Grand Velocity Machine separates itself from single-joint machines. It is built with two motors, allowing it to measure both unilateral (one limb at a time) and bilateral (both limbs together) function.
The practical payoff is balance-ratio testing. Because the two motors operate together, the system is able to simultaneously measure flexion and extension balance ratios — the kind of data that can help flag side-to-side asymmetries and muscle imbalances that may warrant closer attention in a rehabilitation or return-to-play programme. The right motor rotates a full 180 degrees, and the Range Limiter lets clinicians control knee range precisely for safe, targeted testing.
For teams that lean on data, the machine also reports on strength, torque, endurance, power, range of motion and comparison metrics.
Temperature-Stable Hydraulic Accuracy
Repeatable testing depends on repeatable resistance — and hydraulic oil warms up over a long clinic day, which is exactly why compensation matters. The Grand Velocity Machine uses a pressure-activated hydraulic system designed to maintain accuracy as oil warms. In the catalogue’s own words, the system is built to show “no decrease in efficiency when oil temperature increases” — a manufacturer claim about the PRS hydraulic design rather than an independently verified figure.
That pressure-regulated approach is the Pressure Resistance System (PRS) that runs across the Velocity Isokinetics range — a double-acting hydraulic design that is explicitly not an air or pneumatic system. Read the full technology breakdown in The PRS Advantage: Inside Our Patented Pressure Resistance System.
80 Individual Fields of Data
A testing system is only as good as the data it captures. The Grand Velocity Machine’s touchscreen control and Smart System PC display 80 individual fields of data — a deep dataset for tracking a client’s progress across weeks of rehabilitation or a full pre-season testing block.
That volume of data feeds directly into how we think about output. Because POWER = FORCE × VELOCITY, the system can measure and store watts of power generated, not just raw strength. The full rationale is in Power = Force × Velocity: Why We Measure Watts, Not Just Reps.
The Clinical Workflow: Test → Monitor → Rehabilitate
The Grand Velocity Machine is built around a three-stage rehabilitation workflow:
- Test — establish a baseline with isokinetic, isometric or isotonic protocols.
- Monitor — track strength, torque, endurance, power and range-of-motion data across sessions.
- Rehabilitate — use controlled, low-impact exercise to rebuild function.
Intelligent software is designed for quick client setup, so clinicians can move a patient through assessment and treatment without long reconfigurations. The Grand Velocity Machine is designed to support the rehabilitation and recovery of injured tissue, and to help rebuild strength and performance — clinical outcomes that should be validated against your own caseload and, where possible, published evidence.
This test-to-rehab continuum is exactly why the Grand Velocity sits at the centre of our Rehab to Performance philosophy: one system, every stage of the athlete journey.
How It Compares to Other Isokinetic Dynamometers
If you have researched isokinetic testing, you will have come across established dynamometers such as the Biodex System, a long-standing reference standard in isokinetic research. The Grand Velocity Machine is positioned as an Australian-designed, Australian-made alternative rather than a direct equivalent — differentiated by its combination of isokinetic, isometric and isotonic modes, dual-motor bilateral testing, and pressure-activated PRS hydraulics in a single multi-joint unit.
Specs at a Glance
- Speed range: 2–600 deg/sec variable speed control
- Footprint: W 1.8 m × L 2.5 m
- Adjustable angle bench: −30° to 90°
- Motion: rotary and linear
- Resistance: pressure-activated hydraulic (PRS)
- Motors: two (unilateral and bilateral exercise system)
- Data: 80 individual fields of data via touchscreen and Smart System PC
- Extras: eccentric options, counter-thrust platform, stabilising straps, multi-bench position, adjustable height/position/support
- Reports: strength, torque, endurance, power, range of motion, comparison
Movements and Body Regions Covered
- Chest push/pull
- Trunk/back flexion/extension
- Hip — all movements
- Knee flexion/extension
- Shoulder — all movements and pull-over
- Elbow flexion/extension
- Ankle (optional) and wrist (optional)
Is the Grand Velocity Machine Right for Your Clinic?
The Grand Velocity Machine is designed for rehabilitation professionals, sports scientists and performance staff who need objective testing, multi-joint coverage and a single system that moves a client from assessment to rehabilitation. If your facility currently relies on separate machines for isokinetic testing, isometric holds and conditioning work — or you want bilateral balance-ratio data built into every session — it is worth a closer look.
Want to see how it fits your space and caseload? See the full spec on the Grand Velocity Machine product page, or enquire with Velocity Isokinetics and we’ll walk you through the software options and clinical workflow.