Sport and the Body — Training, Tracking, and Learning to Listen

Cycling, running, swimming — and the evolving question of whether to measure it all or just feel it.

Willem cycles, runs, and swims — and writes about all of it. But the sport posts aren't training logs. They're explorations of the relationship between body and data: when a power meter helps you ride better, when a heart rate strap lies to you, and when the wisest thing is to leave the sensors at home and just move.

Running

The half marathon post is where sport meets everything else — sensors, heart rate data, MCADD awareness, and the experience of pushing through 21 kilometres. It's not a race report; it's a reflection on what it means to run when you've spent years learning to listen to your body.

Cycling with Data

Riding with a power meter is the technical deep-dive into data-driven cycling. Swimming and cycling with Apple Watch tests whether a consumer device can keep up with an athlete. The Cyclemeter review documents the search for the perfect bike computer app.

The Philosophical Turn

The most important post in this collection might be the one that questions the whole premise. Data versus Feeling — written after years of wearing sensors during every workout — asks whether all that measurement actually makes you better, or whether it just makes you anxious. The answer changed how Willem trains.

Also explore

the heart · wearable sensors · Whoop Strap review · cycling

Body and Mind

Sport in Willem's writing is never just physical. It connects to sleep, to health monitoring, to the MCADD condition, to the daily bike commute. The body is a system, and exercise is one input among many.