Ever suspect you do more housework than your spouse? Or that certain tasks at work raise your blood pressure? Maybe you wonder why you're sneezing more lately, or if carbs are really what is making you tired after lunch.
Turns out, there's an app or gadget to test all of that. Advancements in wearable body sensors, mobile applications and other gadgets mean that nearly everything we do can be captured, logged and analyzed. And everyday consumers are jumping at the chance to conduct their own experiments - tracking sleep, caffeine intake, kids' studying habits, household chores, even whether a baby is nursing more frequently on Mom's left breast versus her right.
"I don't know if I'd use the word 'obsessed,'" said Ernesto Ramirez, a self-tracking devotee who helped to organize a two-day conference on the subject this month in San Francisco. Speakers at past "Quantified Self" conferences have included a man who developed his own app to see if he could walk every street in Manhattan and a dad who used trackers on his kids to monitor chores.
"I think there's an overall trend toward curiosity and proving knowledge of one's self in the world," Ramirez said.
When Tim Davis of Beaver, Pa., tipped the scales at 318 pounds two years ago, he bought a Fitbit gadget to track his physical activity and the Lose It! app on his phone to track calories. He bought a Wi-Fi-enabled scale that published his daily weight on his Twitter feed and turned to other apps to track his pulse, blood pressure, daily moods and medications. At one point, Davis said he was using 15 apps and gadgets, which he said helped him drop 64 pounds by that following year.
"It's the second-by-second, minute-by-minute changes that really did it," said Davis, 39. "If you're the type of person who likes gadgets and devices and to collect metrics, you're also the kind of person who does not like gaps in data."
A pediatrician in Kansas City, Mo., Natasha Burgert, said apps that track newborn feedings and sleep patterns have become wildly popular among her patients and she now encourages parents to send her the data before their appointments.
"In the first few weeks, parents are so tired. It's really hard for them to give you objective data," Burgert said.
Public health advocates and researchers say tracking technology could be used to encourage people to use less gasoline, conserve water or drive slower by giving them real-time feedback on their daily habits. It also could expose causes of medical conditions that baffle doctors.
HopeLab, based in Redwood, Calif., is one nonprofit looking to harness technology to improve health. It has developed a $30 movement-tracking device for kids called a "Zamzee," and a website that rewards activity with online points and badges.
HopeLab has developed a video game for young cancer patients that lets them pretend to blast cancer cells. Researchers there say their studies have shown that the game improved patients' moods and encouraged them to stick with treatment.
"When you give people a sense of autonomy, a sense of agency, that can actually be very transformative to their health," said HopeLab spokesman Richard Tate.