The most powerful metric
in endurance sports
Next generation endurance testing

Want to train smarter? You need insight into what your body's telling you. Professional athletes have long depended on endurance testing in laboratories to gain a competitive advantage.

BSXinsight gives you the same results as a lab test, but uses LED lights instead of needles to look into your muscle. Using patented lactate threshold technology, it measures both your aerobic and anaerobic fitness. This gives you a complete snapshot of your athletic ability that lets you optomize training down to an energy system level and track improvements over time. That means no more difficult field tests or painful lab visits.

Industry experts predict up to 25% performance increase
Athlete fitting Insight
The insight behind BSXinsight

While laboratory results don’t always translate into training habits and routine blood draws aren’t practical, BSXinsight gives you immediate data that yields powerful results. Leading-edge technology and athlete-based innovation means that your daily training just turned into gold-standard lactate threshold training.

So how does that work? BSXinsight uses LED lights to “look” into the calf muscle. As the light array passes through your muscle tissue, it’s reshaped by chromatophores (or marker characteristics) of your tissue that are unique to you. This creates a biosignal that’s captured and processed by BSX algorithms to generate your unique profile. Analyzing the thousands of signal features generates a lactate threshold value as accurate as blood-based methods.

Insight process versus typical process
Lactate threshold
The gold-standard

Lactate threshold. It’s the pinnacle of performance monitoring used by elite athletes, Olympians and professional coaches worldwide. It’s the single number that defines athletic capacity and ideal training zones.

And it’s now measurable through a simple, wearable device.

BSXinsight™ is the only device to measure your lactate threshold and automatically determine your personalized training zones as you train.

Guage crossing red-line
The insight behind lactate training

Lactate threshold refers to the maximum sustained effort your body can maintain for an extended period of time usually around 45-60 minutes. It’s essentially your body’s redline, and it’s more than 95% accurate at predicting race finish order.

Training (or racing) over the redline can only last for so long, due to the anaerobic contribution to your muscles, which increases based upon intensity and duration of your workout. Eventually your body is forced to slow down or bonk altogether. But always training under the redline results in never learning to rev the engine high enough, sacrificing speed and limiting endurance.