Blonde Girl Taking Pictures On The Treadmill

As a machine:
• Treadmill calorie counters overestimate the number of calories burned by up to 15–20%, according to some reports.
May cause personal injury if not used properly. Of particular concern are children who reach into the treadmill belt while it is running and suffer severe friction burns that may require multiple skin grafts and result in lasting disability.
• Costs of purchase, electrical costs, and possible repair are significantly greater than those of running outside.