Most people couple within their own height range- short couples are 8 percent apart, midsize couples are 8 percent apart. The exception is talls. Tall women, meanwhile, date men who are approximately the same size, 0 to 5 percent taller; extremely tall women go for men 0 to 2 percent taller. Tall men are kids in a candy store, dating whomever they want.
Exercise stimulates growth plates, by putting pressure on bone cells, forcing them to specialize and create new cells. Too much pressure, however, damages the growth plates, which are soft and fragile...The rule of thumb is that lifting one's own body weight (in push-ups,pull-ups, etc) is fine at any age, and kids over fifteen can lift weights.