Does gym or weights lifting affects teenagers growing and tall ?

Not specifically: At fourteen your growth centers have some potential for growth and simple measures help the best.Follow a healthy diet, rest and exercise, but weight lifting will not make you grow taller than your genetic potential.If you want to know how much longer you have to grow, an x-ray of your wrist and hand can be analysed for bone maturity.

Slightly.: Overdoing it severely can damage the growth plates in the bones, decreasing growth.