My girlfriend got me a Fitbit, but the data makes me feel lazy and ashamed. Do I have to keep using it?

I was in my kitchen the other night, slow dancing with my toddler before bedtime, when the Coldplay song “Fix You” came on—a song, I remembered reading, that Chris Martin wrote for then-girlfriend Gwyneth Paltrow after her father died—and I found myself feeling genuinely bummed, all over again, that Chris and Gwyneth had split up. I wondered what had torn them apart or whether—as these things often go—they hadn't been torn apart but slowly undone by some dark, unspoken dissatisfaction or resentment that gradually multiplied until there was so much cumulative darkness between them that it blotted out whatever had been luminescent about their love. And that's when I thought about you and your girlfriend and your Fitbit.

I also thought about Steve Etkin. Etkin is an engineer by training and by temperament who enjoys walking. And so a year ago, his daughter, Jordan, bought him a Fitbit. It seemed like the perfect gift. “I started receiving daily updates,” she told me, “about the number of steps he walked, the stairs he climbed. After a few weeks, I was like, ‘Hey, Dad, you’re really treating this like a job.’ ” (She was also like, hey, Dad, I don’t need all these updates.)

Anyway, it got her thinking. And, because she studies consumer behavior at Duke University’s Fuqua School of Business, she designed a study to test whether, as she put it to me, trackers like Fitbits have the capacity to “suck the enjoyment” out of previously pleasurable activities. Guess what. They do.

Etkin’s study was published in the Journal of Consumer Research. She ran a series of six experiments. In one, for example, she gave her subjects a 16-pack of Crayolas, then made a big show of tracking how many shapes one group colored in while letting others color freely, unencumbered by quantification. She did similar experiments with walking and reading, and in every one discovered the same basic result. “Measurement led participants to color more shapes, walk more steps, and read more pages. At the same time, however, it led people to enjoy coloring, walking, and reading less.” In short, people did more but felt worse doing it. Tracking redefined fun activities as work.

One problem here is that by focusing on quantifiable outcomes, trackers can diminish intrinsic motivation, which makes people stick with activities. Therefore, “measurement may sometimes actually undermine sustainable behavior change,” Etkin writes. Those insurance companies giving Fitbits to their policyholders might be shooting themselves in the (demotivated, stationary) foot.

But you know all this. It’s precisely the cycle of incentivizing and disincentivizing, of judgment and anxiety, afflicting you: that feeling that you can never take enough steps or unlock enough REM sleep. (“When you try your best but you don’t succeed … When you feel so tired but you can’t sleep.”) And, as it afflicts you, it widens the emotional space between you and your girlfriend—it feeds a smoldering grudge, because she handcuffed you with this thing. She tried to fix you, my friend. But her fixing made you feel more broken.

So you’ve got to talk to your girlfriend and take the Fitbit off, even though Etkin’s research suggests this is the worst thing you could do. (When people start tracking then suddenly stop, the fun is still ruined, but they also lose the benefit of increased output—a double whammy of underperformance and joylessness.) But who cares? It could be the only way for you and your partner to remain consciously coupled.