Depends on one's physical condition. Try to start with three 20 minute workouts. If you can't do them running, you can always slow the speed until it is the speed of quick walking. Then try to add more time to your workouts, until you hit 30 minutes. From that point on, you can start adding more speed every other week.
In any Owners Manual, regarding children, close supervision is required. So, in answer to the question, yes the treadmill should be safe for a 13 year old to use, as long as they are not alone.
He can stay there as long as he wants to stay there. He may enjoy the same for some time.
a exercise bike or a treadmill
Research has shown that the proper incline for a 25 year old female will vary depending on the specific treadmill. The incline stipulations vary from 10 to 15 percent for most treadmills.
as long as you know who they are and have known them for a long time, then yes it should be allowed. but no sexual interactions.
Yes.. if your old and prone to falling.
She finds a treadmill and does work on that thing.
they should as long as they want to
5 feet long
2000 years
About 3 feet.
should be around 2ft in lenght