I don't think any minor weight training will affect your height...
however i recommend waiting until your 15-16 to start weight training and even then you should go very slowly and ask the advice of a personal trainer.
No. It's a common myth that's been perpetuated for some time that weight lifting stunts growth. 12 year olds should certainly be supervised when lifting and instructed on proper form, but weight lifting done in good form should not stunt growth.
You shrink in height as you get older as the spine ages
No, karate will not change or affect your height.
If you weigh 55 kilograms the weights you lift be as heavy as instructed by your trainer. Rarely will your body weight determine the heaviness of the weights to be lifted. You will start with light weights and keep adding weights as you progress.
Body weight for girls (children or teenagers) is related to height and body composition. Therefore, there will be no 'average' weight in relation to age but there will be a healthy weight in relation to height and body composition. For in-depth information about weight in relation to height, and to see the distribution of weights and heights of children at various ages, please see the page link, further down this page, listed under "Related Questions."
There is no perfect weight for a given height. Instead, there are a range of healthy weights depending on age, build, muscles, etc.
Lifting 40 pounds at the age of 13 can affect your growth. It can cause a persons muscles to become weakened later on. The age of 13 is too young to be lifting heavy weights.
Yes in a way it can, you see if you work out properly there is none or little height benefits but do it improperly can affect bones and plates and muscles vital to growing
Yes because it can stunt your growth, but doing small amounts is alright because this will keep you toned.
it is due to a number of factors such as age, height, weight or general fitness
If you never hit puberty you wont grow to adult size.
A child who is around 8 years old would weigh 50 pounds. The weight depends on the gender of the child and their height.
no. i think you just need to be fit, and know what you are doing.