DIVING.-

Diving refers to the sport of performing acrobatics whilst jumping or falling into water from a platform or springboard of a certain height. Diving is an internationally recognized sport that is part of the Olympic Games.

Divers do not consider themselves swimmers. While each sport shares a pool, and may compete side by side when doing so for their schools, the two sports are very different. Swimming is a full body exercise with emphasis on upper body strength and speed, diving is a full body exercise with emphasis on grace and execution; swimmers most frequently suffer overuse injuries, divers most frequently suffer impact injuries or strains.

Dive positions

During the flight of the dive, one of the four positions may be specified:

* Straight - with no bend at the knees or hips
* Pike - with knees straight but a tight bend at the hips
* Tuck - body folded up in a tight ball, hands holding the shins and toes pointed.
* Free - Some sequence of the above positions.

These positions are referred to by the letters A, B,C and D respectively.

Mechanics of diving

At the moment of take off, two critical aspects of the dive are determined, and cannot subsequently be altered during the execution. One is the trajectory of the dive, and the other is the magnitude of the angular momentum.

The speed of rotation - and therefore the total amount of rotation - may be

varied from moment to moment by changing the shape of the body, in accordance with the law of conservation of angular momentum.

The center of mass of the diver follows a parabolic path in free-fall under the influence of gravity (ignoring the effects of air resistance, which are negligible at the speeds involved).

Safety

There is a general perception of diving as being a dangerous activity, and this has contributed to the decline in availability of facilities. In fact, despite the apparent risk, the statistical incidence of injury in supervised training and competition is extremely low.

This is a picture about the risk involved the sport. However the Diving Sport have been increased in the world.