If i work out and vet muscles while i am in puberty and have get higher testosterone level naturally my growth plates will fuze and iwill stopgrowing?

Define workout ?: Your testosterone level is controlled centrally by your brain interacting with glands based on complex genetically defined actions. It has nothing to do with how often you work out, although you are more likely to gain muscle while it is in the higher levels of the late teens & early 20's. If you power lift before your growth plates close you are at some risk of localized injury.