Anybody know anything about aseptic bone necrosis and the epiphyseal plate?
Interesting; no one has bit on this bait....
Aseptic bone necrosis is seen in commercial divers with many many dives. There has been concern that pressure will negatively effect the epiphyseal plate resulting in growth issues. There have been no studies (naturally)
Harris and others base much of their argument upon Jean Piaget's theory of cognitive development. According to Piaget children at age 10 are moving out of the preoperational stage, characterized by intuitive responses, and into the concrete operational stage, characterized by the use of logic, but an inability to process problems in an abstract manner.
The problem with this is that the are no absolutes in cognitive development; more recent studies indicate a continuum based upon contextual influences yielding maturation in various domains at various times.
Children move at their own pace; some are ready to dive, with proper supervision, at ten; others are not ready at thirty.
I was diving very young with but these instructions:"never hold your breath", "pinch your nose and gently blow before going under, and do it every few feet until you are where you want to be" "when it is hard to breathe pull the lever""do not ascend faster than your smallest bubble" and I, along with many others am fine well into my 50s
Each child should be judged individually, by parent and instructor, together; with both aware of potential negative outcomes.
And due to the potential for growth plate issues depth, duration, type, and number of dives per year should be considered as well.
Most importantly a parent with a diving child must realize that they are effectively diving solo.
The payoff is, as others have mentioned, watching the wonder unfold for a child who is seeing the underwater world open up to them....