NEW YORK (CBSNewYork) — There's a new warning for anyone who wears a fitness tracker after some dangerous side effects have been reported.
Instead of promoting good health, some have led to a fitness fail.
Chris Nelson is an active dad who liked counting his steps and tracking his heart rate with his fitness tracker, but says while putting his three-year-old daughter Emily to bed his Fitbit Charge 2 shocked him.
The jolt caused him to drop his baby.
"It was clearly an electric shock," he told CBS2.
Emily wasn't hurt, but Chris says it left a painful lump on his wrist and caused his hand to go temporarily numb.
"The best I can figure, I was just shocked by the connector that was on my wrist," the young dad said.
Mom Lauren Reiss swears two different Fitbit models shocked her.
"It shot up my arm, it was intense," she said. "As soon as I looked down at my arm I noticed immediately that it hurt."
She says one of the jolts left a lasting mark.
"You can see my burn," she said. "It matches perfectly."