Technology has developed rapidly. The opportunity to understand the body in real time has never been greater. What could once only be measured in laboratories or elite sports environments is now found on people's wrists, fingers and bedside tables.
At the same time, another discussion is growing in parallel: What happens when people start measuring themselves more and more?
Because while the technology promises greater self-awareness, many people feel that their relationship with their own body has become more complicated. Health sometimes risks turning from something we feel into something we monitor. And that is not just a philosophical observation.
In recent years, several researchers and psychologists have pointed out that body measurement can both help and harm our well-being, depending on how the technology is used and how the data is presented.
When data actually helps
At the same time, there are good reasons why interest in bodily signals has grown so quickly. Physiological data can give people an earlier understanding of workload, stress and recovery long before problems become truly visible. In both research and elite sport, HRV has long been used to understand how the body responds to training, sleep, mental strain and recovery over time.
HRV, Heart Rate Variability, describes the variation in time between heartbeats and is seen as an important signal of the body's ability to adapt to strain and recovery. Higher HRV is often associated with better physiological flexibility and recovery. Lower HRV can be a sign of stress, high workload or insufficient recovery over time. But the important thing is precisely those last words: over time.
Because HRV is complex. A single value says very little on its own. Sleep, exercise, alcohol, illness, worry, workload and mental stress can all affect the signal.
That is also why many researchers stress that HRV should primarily be interpreted in relation to the individual's own baseline and development over time — not as an absolute daily grade.
As the researcher and HRV expert Stephen Porges has put it:
“The body is constantly adapting to the environment. Physiological signals only become meaningful when understood in context.”
It's an important point. Because bodily data without context mostly risks becoming just numbers.
When measurement starts creating stress
The problem is that many systems still present bodily data as if it were simple. Good or bad. Green or red. Ready or not ready. And that is where things sometimes start to go wrong.
For some people, the measurement itself becomes a stress factor. Not least among performance-driven people who already find it hard to relax. You wake up, look at your app and are told your recovery is low. Even though you actually feel quite alert, you start doubting your own feeling.
“Oh well. I guess it's going to be a bad day today.”
The phenomenon is so common that researchers sometimes talk about a kind of “digital nocebo effect” — that is, when negative expectations themselves start to affect how we feel and function.
The technology that was supposed to create calm instead risks creating yet another area to perform in.
Sleep becomes something to succeed at. Recovery becomes yet another project. The body becomes another system to optimise. And suddenly people are stressing over their stress scores.
From control to understanding
That doesn't mean body measurement is wrong. But it does mean the technology needs to be used with greater thought. The purpose of physiological data shouldn't be to create more control or more perfect days. The purpose should be to help people understand patterns that are otherwise hard to see.
How workload affects focus over time. How recovery changes during intense periods. How sleep, work environment and stress are actually connected.
That requires something more than just data. It requires context. Reflection. And perhaps above all a more human way of using the technology.
Because the health and performance systems of the future will probably not win by measuring the most.
They will win by helping people understand more — without creating more stress along the way.
And that is quite an important difference.
Magnus Holby
Interim Brand and Marketing Manager, Zmartrest