There is no evidence or study anywhere that lifting is really bad for young peoples or teenagers. I for example perform high volume lower weights more reps when training for half marathons marathons or. How tall you grow is more related to genetics. Do weight lifting and crunches stop your height. People who are in their growing age ie whose height will gradually increase by genes factors should not inculcate some of the heaviest weights in their workout regimen. Lifting weights can improve your muscular endurance more than pure cardio can.
Indeed weight lifting can lead to minor compression of spinal discs in adults. Despite all the myths about weightlifting and growth none hold any weight. And it is possible that a slight decrease in height could occur. Its just a myth all around the world lifting weights do not stunt the height. Its your growth hormones or hereditary that will decide your height but not completely true. However he points out that this is something that can result from poor form weights that are too heavy and a lack of supervision.
In fact it can even strengthen your skeleton and help prevent injuries according to a 2016 study in sports endocrinology. Research is very clear that weightlifting doesnt interfere with growth. Additionally some exercises can actually improve your height make your shoulders and rib cage bigger if you do them during puberty and up to the age of maybe 21 23 or so. But its not the result of lifting weights correctly. Similarly lifting weights that are heavy enough that you can eek out only 6 to 12 reps per set with proper form will help increase muscular size as opposed to muscular endurance. When it comes to weightlifting there are probably some norms which should be followed depending on the age factor.