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1.There is an average weight of 18 - 20 years when ossification centres in the bone fuse / closes, this is said after multiple studies.
2.That means some get stopped at 18 some at 20-24 years.
3.So ideally we can not go against the natural things happening in the body.
4.You can try good workup, try some
yoga that might help - but there is no documented studies said that there is growth after the borderline.
5.So do not get depressed, enjoy the life as it is, do some workup good for health and may work a bit. Good luck.
Hope i have answered your query.
Any thing to ask do not hesitate
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888 Thank you.