Leg-to-leg asymmetry
Side-by-side comparison
How much force each leg contributes in squatting, jumping and landing — expressed as a percentage difference.
Technology
VALD ForceDecks
Dual force plates that measure what each leg is really doing — thousands of readings per second, revealing asymmetries you cannot see or feel.
The asymmetry you cannot feel
After a knee or ankle injury, most people stop limping long before their legs are working equally. The body is efficient at hiding a weak side — and a difference of fifteen or twenty percent between legs is almost impossible to detect by feel.
ForceDecks are two independent force plates. You stand, squat, jump or land on them, and each plate measures the force that leg is producing thousands of times per second. The comparison between the two is where the useful information lives.
This matters most at the point people usually get hurt again: the moment they feel fine and return to sport.
What it measures
Jump and landing
Power and control
Jump height, take-off force and how you absorb landing — often the first metric to drop and the last to recover.
Balance and loading
Quiet-stance testing
How weight is distributed when you simply stand still, and how steadily you hold a single-leg position.
Where it changes decisions
- Return to sport. Clearance becomes a measurement against a target, not a conversation about how the knee feels today.
- Post-surgical rehabilitation. Progress after ACL or ankle reconstruction is tracked in force, week by week.
- Recurring lower-limb injury. A persistent asymmetry explains why the same calf or hamstring keeps failing.
- Performance training. Baseline power and symmetry, then evidence that the training is working.
What a session looks like
Testing takes a few minutes. You step onto the plates and perform a short set of movements — typically a quiet stand, a squat, and a jump or hop, depending on what we are assessing and what stage of recovery you are at.
Your results appear immediately. We show you the number for each leg, the gap between them, and what that gap means for what you want to get back to. Re-testing later in your rehabilitation shows the gap closing — or tells us the plan needs to change.
Stop stretching the symptom
Book a posture assessment and address the loading that keeps bringing it back.