We set the goal at one push-up a day, because we doubted the barrier and not the willpower

PUSHERS is an exercise app being built at WorldWideSomething (전세계무언가). Its founder, Dan Kim (김대은), researches Human-AI Interaction at Kwangwoon University. The company studies the psychology of a behavior first and designs the app from what it finds. PUSHERS has not launched yet, so this is a record of a design decision rather than a result.

Most exercise apps start from motivation. Send more reminders, make the goal more impressive, make the failure more visible. We doubted that premise. What a person who cannot keep exercising lacks may not be will, but the cost of starting.

“A goal you miss eats into the next day. So we doubted the goal instead of the person.”

That cost is a long line. Change clothes, travel to a place, secure equipment, pay a membership, stand in front of other people. For someone who finds the gym intimidating, or who has no idea how to train alone, the whole line is the barrier. The exercise itself sits at the very end of it.

So the goal in PUSHERS is one push-up a day. No equipment, no membership. A floor and a body are enough. One rep looks too small to matter, but what we were cutting was not the volume. It was the length of the line. When the line is one step long, the reasons to drop out go with it.

There is a fair objection to lowering a goal: if it is that easy, nobody takes it seriously. Our hypothesis runs the other way. A goal you miss eats into the next day, and a goal you keep lowers the threshold of the next day. So the streak sits at the center of the screen, and the reward compounds the longer it runs. The reason to do one rep today is not the volume of today. It is the run of days behind it.

The camera came out of the same question. Counting push-ups means looking at a body, and the moment a person feels that footage is going somewhere, that becomes a new barrier. So the video is analyzed on the device and discarded immediately. Even an online opponent receives only joint coordinates. No face and no footage leaves the phone. That is how we test the idea that privacy is a precondition for continuing, not a feature on top of it.

Doing it alone is also a barrier. Friend invitations, co-op raids and emoji cheers move exercise away from a private resolution and towards a social promise. The stages and the season pass are enjoyment laid on top of that. They are not the reason to train.

We do not yet know whether the design is right. PUSHERS has not launched, and we have no data on whether one rep actually carries into the next day. What we doubted is clear enough. We did not doubt the person who cannot keep exercising. We doubted the barrier placed in front of them.