Muscle Age
EMG muscle wearable
In development
One sensor pod worn over a muscle that reads its thickness, quality, activation, oxygen and stiffness in a weekly four-minute test.
- 5
- sensing methods in one pod
- 4 min
- weekly test
- 35 g
- pod weight target
What Kumar did
- Wrote the product concept, version 1.0, in October 2026.
- Chose one pod that combines ultrasound, impedance, EMG, muscle oxygen and stiffness, and a short weekly test over all-day wear.
What it is
A reusable pod worn over the thigh, calf or biceps that snaps into an elastic strap or a disposable patch. It is built for a short weekly test, because muscle changes over weeks, not hours.
How it works
The app guides a four-minute protocol: a resting ultrasound scan, impedance and stiffness readings, a three-second maximum contraction, a hold at half effort until fatigue, and a contracted stiffness reading. Four inline electrodes run impedance, and the inner pair doubles as the EMG pair.
Engineering
Five sensing methods share one pod: A-mode ultrasound, impedance myography, two-channel surface EMG, near-infrared muscle oxygen and a voice-coil tapper for stiffness, with heart rate, SpO₂, skin temperature and motion alongside.
Specifications
| Placement | Thigh, calf or biceps |
|---|---|
| Form | Snap-in pod, strap or disposable patch |
| Pod size target | About 50 × 38 × 14 mm, under 35 g |
| Muscle channels | Ultrasound, impedance, 2-channel EMG, NIRS, tap stiffness |
| Ultrasound | Single element, 2.25 MHz, A-mode |
| Impedance range | 5 to 200 kHz |
| NIRS wavelengths | 770, 810, 850 nm |
| Core test | 4 minutes, weekly |
| Battery target | 7 days of typical use |
| Sealing | IP67 |
- Five sensing methods in one pod
- A weekly four-minute test
- Strap or patch, the same pod