Threshold training made easy

No interruption. No needles. Just facts.

Our cutting-edge wearable sensor leverages safe, proven ultrasound technology combined with advanced AI to provide real-time guidance on optimal training intensity, eliminating the need for blood sampling.

The future of threshold training is wearable

About SonoFit

Training optimization with wearable sports technology

Based in Trondheim, Norway, we're building a training experience that fits directly into the athlete's rhythm→continuous measurement, clear interpretation, and guidance that supports better decisions in real-time.

Real-time guidance— Immediate feedback during training sessions

Wearable precision— Lab-quality insights in a compact form

Non-invasive— No needles, no interruptions

Revolutionary technology

SonoFit combines cutting-edge ultrasound technology with advanced AI algorithms to deliver precise, non-invasive anaerobic threshold monitoring for optimal training. Professional-grade physiology. Made wearable.

The SonoFit Sensor

Our proprietary ultrasound sensors provide unprecedented accuracy in anaerobic threshold detection without invasive testing. The compact design fits comfortably during any workout while delivering measurements in real-time.

Artificial Intelligence

Transform workout data into actionable insights with our AI-powered analytics platform. Track performance trends over time, identify optimal training zones, and receive personalized recommendations to maximize every training session.

Seamless Connectivity

Instantly sync your performance data across all your devices with reliable Bluetooth connectivity. Our app provides real-time feedback during workouts and comprehensive analysis afterward to keep you training at your optimal level.

Recent News

Stay updated with the latest developments, milestones, and announcements from SonoFit.

Jan 20, 2026

New intern: Tryggve Klevstul-Jensen

We're happy to welcome Tryggve Klevstul-Jensen to the SonoFit team!

PeopleGrowth

Jan 09, 2026

Technical milestone achieved with in-house ultrasound transducers!

Just before Christmas, we received the first ultrasound transducers based on our in-house design (left). Only one week into 2026 we achieved high-quality Doppler spectra (right) using these transducers and our prototype electronics. Another important technical milestone reached!

TechnologyProduct Development

Dec 22, 2025

Flow phantom

Mathias (seated) has successfully integrated our new flow phantom and pump with the SonoFit sensor and latest electronics. Accurate flow measurements are critical for quantifying thresholds, and this setup plays a key role in validating our measurements. Magnus (standing) provides support as needed.

TechnologyProduct Development

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