Hello, there is generally no age limit. But young people should be careful not to overdo it. Be careful not to get hurt. The same is true of age. Of course. The old and the young are all examples of successful exercise. Don't be too nervous. It is good to pay attention to correct and scientific exercise. If you want to be safe, it is safer to exercise with equipment. Because the trajectory is fixed, the resistance can be adjusted.
I hope I can help you, thank you!