★★★★★ 4,58/5 · 66 reviews on Trusted Shops
490€
Monitor muscle intensity and recovery more easily than ever. Progress faster with real-time measurements.
The Q-LAC set includes:
Sensor, mounting strap, app, USB cable, license.
Everything you need to start training the very same day.
NIRS module, 42 g, IP64
in your selected size
charges 0–100% in 90 min
iOS, Android, Connect IQ
Measure your thigh circumference at its midpoint, standing, without flexing the muscle.
| Size | Thigh circumference |
|---|---|
| XS | 39-42 cm |
| S | 43-48 cm |
| M | 49-55 cm |
| L | 56-62 cm |
| XL | 63-70 cm |
Most athletes monitor their training based on heart rate, pace, or power. The problem is that these are only indirect indicators of effort and don’t show what’s happening in the muscles.
It reacts with a delay to changes in intensity. The result is affected by stress, temperature, dehydration, and fatigue.
It depends on terrain, wind, and weather conditions. It does not show the actual metabolic load on the body.
| Method | QLAC | Heart rate | Pace | Lactate test |
|---|---|---|---|---|
| Reaction speed | ✓ | ✕ | ✕ | |
| Accuracy | ✓ | ✕ | ✓ | |
| Daily readiness | ✓ | ✕ | ✕ | ✓ |
| Ease of use | ✓ | ✓ | ✓ | ✕ |
QLAC is the only method that combines reaction speed, accuracy, assessment of daily readiness, and ease of use in one solution.
QLAC shows in real time what’s happening in your muscles. This allows you to control training intensity, delay fatigue, and train more consciously.
See when your muscles start losing performance, so you can adjust your pace right away.
Helps you spot the moment performance starts to drop, so you can avoid overtraining.
Q-LAC helps you stay in the right training intensity — the next step forward, from building endurance to threshold training.
Post-training data analysis helps you better plan future sessions and avoid excessive fatigue.
Q-LAC is a sensor using NIRS technology that measures muscle oxygenation (SmO₂) in real time — whether you're running, cycling, or strength training.
Control your training intensity and delay muscle fatigue with a real-time view of your oxygenation.
Monitor your muscle activity during effort, especially useful on climbs and interval training.
Watch how muscle oxygenation changes across your sets, so you can plan rest and volume better.
Comparison of two methods of monitoring metabolism during training.
Analyze metabolic changes throughout the entire training session without interrupting the effort.
Each result shows only a single moment of effort and requires stopping the training.
Marek K.
kolarz szosowy, kat. Elite
„Pierwszy raz widzę próg w trakcie interwału, a nie tydzień po teście w laboratorium. Po dwóch miesiącach przestałem robić testy mleczanowe w ogóle.”
Anna W.
trenerka biegów długich
„Prowadzę 18 zawodników. Q-LAC zastąpił mi comiesięczne testy całej grupy – oszczędność czasu jest ogromna, a dane spójne z tym, co widziałam z krwi.”
Shipping within 24 h · 30-day returns · 2-year warranty
SEASON KICKOFF
Sensor + thigh strap + USB cable + iOS / Android / Garmin app
App included, no subscription
Sizes XS–XL · shipping within 24 h · 30-day returns
