Fitkol NB Series Brings AI-Driven Adaptive Running Home

Fitkol has officially introduced its NB Series, a new lineup of AI-powered treadmills designed to rethink how home running workouts adapt to the human body. Featuring the company’s proprietary SportMind intelligent training system, the series combines real-time physiological feedback with large language model technology to dynamically adjust running sessions without constant manual input.

Consisting of two models, the NB2 and NB6, the NB Series reflects Fitkol‘s body-first training philosophy, prioritizing natural pacing, joint awareness, and simplified interaction. Instead of forcing runners to adapt to preset programs, the system continuously adapts to the runner, aiming to reduce both physical strain and mental fatigue during workouts.

SportMind Intelligent Training System Explained

At the core of the NB Series is SportMind, an LLM Agent–driven training system designed to interpret heart-rate, cadence, and user profile data in real time. By processing these inputs continuously, SportMind adjusts speed and incline automatically to keep runners within an optimal training zone without sudden changes.

This approach reduces the need for frequent button presses or screen interactions, allowing runners to focus on form and breathing. The system also supports hands-free voice commands, enabling on-the-fly adjustments while maintaining training flow.

Body-First Running and Joint-Conscious Design

Unlike traditional treadmills that rely on rigid speed intervals, the NB Series emphasizes smooth pacing transitions. Heart-rate-based rhythm control helps minimize abrupt acceleration or deceleration, which can place unnecessary stress on joints.

This design philosophy supports a wide range of runners, from beginners managing weight and consistency to experienced athletes focused on endurance efficiency. By maintaining stable intensity levels, joint safety becomes a built-in feature rather than an afterthought.

Hardware Built for Consistent Performance

Both NB Series models are powered by a 5.0HP German Bosch brushless motor, engineered for sustained output and long-term durability. This motor configuration supports extended training sessions while maintaining stable performance and reduced mechanical noise.

The treadmills also feature a 20-inch commercial-grade running surface, offering ample space for natural stride patterns. This combination of motor strength and deck size positions the NB Series as a serious option for daily training rather than occasional fitness use.

NB2 vs NB6: Two Models, One Training Philosophy

While the NB2 and NB6 share the same core hardware and AI capabilities, the lineup is structured to address different user priorities. Both models integrate the same adaptive intelligence and body-first control logic, ensuring consistent training behavior across the range.

The NB Series is designed to scale from everyday fitness routines to endurance-focused programs, maintaining simplicity while delivering meaningful physiological feedback. Regardless of model choice, users receive the same intelligent training foundation.

Conclusion

With the NB Series, Fitkol is positioning AI not as a novelty, but as an invisible training partner that reduces friction and improves consistency. Early Access began in late December 2025, with the official launch scheduled for February 2, 2026, and availability expanding across selected global markets.