04/09/2026
A physiotherapist once told Karianne Kraaijestein that women recover more slowly at this stage of life, but nobody could say exactly why.
There simply isn't enough research.
That gap is what pushed her to start Adaptive, an intelligent coaching layer for female endurance athletes whose bodies don’t follow a generic training template.
Here's what she had to figure out first:
1. Build around real context, not averages.
2. Track what’s usable, not just interesting.
3. Test the economics before you build.
Curious how she incorporated the learnings in her new company?
Listen to the full conversation with Karianne Kraaijestein and Dirkjan Hupkes.
Link in bio 🎙