Relative Effort

Strava's most powerful training feature — Fitness & Freshness — was locked behind a steep learning curve. It lived only on the web, at a time when athletes were moving exclusively to mobile, and it was so data-dense that most people didn't know what to do with it. Understanding your own progress felt like homework.

Through a process of interviewing 16 athletes, we learned that people weren't struggling with motivation — they were struggling with interpretation. The data felt like something you needed a coach or a degree in sports science, to understand. Athletes were doing the hard work. The tools just weren't meeting them where they were.

The insight that shaped everything was simple: the data isn't the point — what it's telling you is. Rather than leading with charts and metrics, we led with a plain-language interpretation of an athlete's effort and what it meant for their training. The visualization provided context, but the "coach's insight" drove the experience.

We also made a deliberate choice to personalize effort scores against each athlete's own history, not Strava's user base as a whole. Your hard day should feel hard relative to you — not relative to a professional cyclist halfway around the world.

The result was a training tool that felt empowering to everyday athletes, not just the ones who already knew how to read the data.