There was a time when the only feedback from a workout was how we felt. Today, that’s no longer enough.  

Across developed markets, almost half of adults now use a smartwatch, fitness tracker or smart ring, monitoring heart rate, sleep, recovery, stress, training load and more. People don’t just want to exercise. They want evidence. How hard did I work? How much did I burn? Am I getting fitter? Am I ready to go again? 

The Quantified Self isn’t a niche pursuit any more. It’s the mainstream expectation – and it has transformed the way people engage with health and fitness. 

As an industry, we’ve embraced that shift. Connected equipment, integrated apps and personalised performance metrics have become central to the experience, helping members measure progress, stay motivated and understand the impact of every session. 

But as the volume of data grows, so too does an important question: how much confidence should we place in the numbers? 

It’s a question worth asking gently, because the answer isn’t simple. A widely-cited Stanford University study, published in the Journal of Personalized Medicine, tested seven popular wearables against laboratory-grade equipment. Heart rate measurement, it found, was impressively accurate for cycling in particular, with six of the seven devices achieving a median error below 5 per cent. Energy expenditure was a different story, with no device achieving an error below 20 per cent.  

Now, this was 2017 and technology continues to march on. But the point remains: when people are basing life decisions on the data we give them, our metrics have to be trusted. When a rider pushes for one more watt, that watt has to be real, not an estimate dressed up as certainty. 

It’s why we’ve spent the last 18 months building BODY BIKE Precision Lab™, a proprietary testing environment developed in pursuit of the world’s most accurate indoor bike. Through rigorous batch testing, Precision Lab verifies the accuracy of BODY BIKE’s power, cadence and distance measurements, giving operators and riders confidence in every performance metric.  

It’s a natural extension of a philosophy we’ve held since we launched our first app back in 2016: that riders should own their data, take it with them and, above all, be able to believe in it. 

In an industry built on effort, honesty and hard-won progress, the numbers only mean something if they’re numbers you can trust. 

Uffe A Olesen
CEO, BODY BIKE International