Guy thinks wife's Fitbit is malfunctioning, turns out she's pregnant

Three days ago, Reddit user YoungPTone posted to the site's Fitbit forum asking for some advice on his wife's fitness tracker, writing that it had been "showing her heartbeat (as) being consistently high over the last few days".
"Two days ago, a somewhat normal day, she logged 10 hours in the fat burning zone, which i would think to be impossible based on her activity level," he wrote.