(STAR-TELEGRAM) — Looks like teenagers being lazy is more than just a stereotype.

A new study conducted by researchers from the Johns Hopkins Bloomberg School of Public Health in Baltimore looked at more than 12,500 people’s exercise habits by having them wear fitness trackers for a week. When they separated that data by age, they found something alarming about teenagers.

“Activity levels at the end of adolescence were alarmingly low, and by age 19, they were comparable to 60-year-olds,” says the study’s senior author, Vadim Zipunnikov.

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