kinevi
EMG Muscle Analysis

Same Swing. Different Muscles.
Different Results.

Your swing looks fine on camera. But the muscles tell a different story. EMG reveals the invisible compensation patterns that cameras — and coaches — can never see.

Read Your Muscles See the Illusion
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THE VISUAL ILLUSION

Two golfers. Same positions.
Completely different engines.

Camera-based analysis can only see joint positions. It misses the 95% of force that comes from internal muscle activation patterns.

Golfer A

Core-driven

Camera sees (identical):

Shoulder turn
92°
Hip turn
45°
X-Factor
47°
Wrist angle
78°

EMG reveals:

Core activation 87% MVC
Forearm activation 32% MVC
Sequence Core → Arm ✓
265 yds drive distance

Golfer B

Arm-dominant

Camera sees (identical):

Shoulder turn
92°
Hip turn
45°
X-Factor
47°
Wrist angle
78°

EMG reveals:

Core activation 31% MVC ⚠
Forearm activation 89% MVC ⚠
Sequence Arm → Core ✗
215 yds drive distance

Same positions on camera. 50 yards apart on the course. The difference is invisible to video.

COMPENSATION PATTERNS

When small muscles do
big muscles' jobs.

Compensation is your body's workaround. The forearm takes over when the core fails to fire. The result? Same swing shape — less power, more injury risk, zero improvement.

1

Core doesn't fire in time

Obliques fail to activate at the start of the downswing. The chain has no proximal driver.

Low EMG signal (31% MVC)
2

Forearm compensates

Without core drive, the forearm activates early and hard to "throw" the club. Overuse leads to strain.

High EMG signal (89% MVC)
3

Energy chain breaks

The kinematic multiplier drops from 5× to 2×. Distance drops 50 yards. Consistency drops. Frustration rises.

Camera diagnosis: "Swing looks fine"

EMG diagnosis

"Core activation is 31% when it should be 80%+. Forearm is compensating. Focus drill: oblique activation before takeaway."

Actionable. Specific. Invisible to cameras.

THE CAUSALITY CHAIN

Cameras show symptoms.
EMG finds the cause.

Every swing fault has a hidden root. The causality flows from muscle to motion to result. Only EMG captures the first link in the chain.

Root Cause
Muscle Activation
EMG signal
Effect 1
Joint Angle
Camera/Vision
Effect 2
Segment Velocity
IMU sensor
Result
Ball Flight
Distance & direction
Without EMG

"Your shoulder didn't rotate enough."

Visible symptom. Not actionable.

With EMG

"Your core fired at 31% — shoulder rotation wasn't driven. Activate obliques earlier."

Root cause. Actionable fix.

Your swing looks fine.

Your muscles tell the truth.

Be the first to see beyond the surface. EMG + IMU sensors reveal the invisible muscle patterns that determine your kinematic chain efficiency.

No credit card required · 4 IMU + 4 EMG sensors · Ships Q3 2026