What is a good age to start working out?
Any age can workout but I wouldn't start lifting until high school. You can hurt yourself if you lift too young. Running and pushups are good for all ages as are core exercises like crunches.
Be active at all ages and that is sufficient "working out." Working out is just supplemental exercise when you don't get enough daily activity.
You should start being active at any age. But if you mean, REAL working out, at gyms and stuff, then I'd say 13 and up.
I'm 13 and twice a week I work out lightly at a gym for the heck of it because I have nothing else to do, but any age is fine
good for all ages but limit your self depending on your age
Depends how old are you and has your body developed yet