The improved posture gained from regular functional exercise can make you look noticeably taller. Of course every accident causing broken bone can also cause growth plate injury. If youre only a few pounds overweight losing those pounds isnt going to make a difference in your height. Once your growth plates become fused together theres no chance that you can increase your height regardless of what the supplement label advertises. Essentially the spinal column is like a coil. No it doesnt affect ur height.
Crunches on the other hand do not affect height growth in any of the ways. Some 85 of growth plate injuries will heal with no lasting effects. From this perspective skiing or climbing trees are just as dangerous activities as weight lifting. Weight lifting can stunt ur height. This increases the space between the vertebrae which ultimately results in height growth. This article looks at how people can increase their height during development.
On the other hand those who are mature enough and have come par the hormonal height increment factor they can lift heavy weights but there should be a proper and well defined form for doing it. Get the right amount of sleep. Weight issues injure your spine column by increasing the weight it has to bear. Most likely the myth that lifting weights stunts growth came from concern over kids causing damage to their growth plates if they participate in a strength training program. Such accidents are not common but they definitely do exist. The proper age for weight lifting is from 21 years.
The exercise you put in to do it though might. Even if u do too much push ups it wont still affect ur height. By stretching it you are able to turn out to be taller. Genes determine around 80 of a persons height but environmental factors can also affect it.