King Bolt is, for example, the eight times the Olympics have been chosen as a professional player, tested by Australian Central Coast Mariners after he retired from the stadium and the stadium.
It's a 32-year-old young man, a 100m world record. But his ability is in question, as the physical and physical characteristics of football are very different from being the fastest man in the world.
Martin Hagger, a psychologist at the Curtin University of Perth, said athletic sports at the end of athletics are never easy.
"Players like Bolt have what they call psychologists call for a great need for reach, a car that is meant to compete with the competition and the need to show themselves (and others) high performance in the competition, "he told AFP.
"This also looks like some personal characteristics such as the expulsion and the confidence.
"There are also, possibly, some of the design templates, but that's not one of the subjects like many players in the squad are not necessarily involved in integration issues."
Retirement can be a difficult time for professionals and women in their lives as they know they are completely changing.
The noise of the fans left, like adrenaline rush of success. Many have struggled with problems, especially the Australian swimwear Ian Thorpe and Grant Hackett, both of whom have been fighting for demons, including depression, after their captives hang out.
& # 39; We need to challenge & # 39;
Hagger said this was part of the cause of some repetition, or attempted to break up with a new sport. "The high demand for success can also lead to a substantial flow of lives in the sport when they retire," he said.
"Many, they will find other ways to submit their competitiveness needs, such as administration and training, or elsewhere.
"However, some feel that the need is only to carry out a sporting arena, so they are doing a great repetition (with different levels of success) or they want to go to other games. "
For example, Cricketer England Andrew Flintoff and former Manchester United player Rio Ferdinand, both of whom were on the pitch. Ivan Lendl, eight times, took control of the golf after retiring tennis, playing a great challenge.
"Golf has given me some things like tennis and I can not give them any more," Lendl told the Guardian in 2008.
"I need to be competitive, I have been trained to run all my life, and I can not avoid that, I would love the dog."
There are also many successful stories, and most of them have reached a moderate level. New Zealand's New Sonny Williams star changed his chest rack, winning all the heavy fighting he had with his football skills. And Ellyse Perry, who specializes in various Australian professionals, has played for Australia in World Cup football and soccer.
& # 39; A small problem & # 39;
It may have been the highest-ranked sport in Jordan, considered the all-time basketball player. He was named Chicago White Sox Baseball after retirement in 1993 and was given a contract with a contractor. However baseball basketball never left and returned to a few weeks later.
The United States claimed to have lost the desire to play basketball after the death of the father who wanted to make a difference. Fleur van Rens, sports psychologist and Elite Athlete's head at Murdoch University in Perth, said sportsmates have changed sport for many reasons, including loss of life after retirement and even gymnastics depend on.
Players who have not produced any other identities appear to be experiencing a small problem – they need to know who is outside their game, "she told AFP.
"This makes the retirement pension system vulnerable to some of the former players … and it may make them consider the return or search of another game."
The absence of self-assessment can also be partial, but it can easily enjoy sport or to carry out the longer dreams, such as Bolt. Many high-quality players have won other games as youths, but they wanted to choose – Rafael Nadal was a football player before focusing on tennis, while Roger Federer was a good schedule.
Bolt was a promising footballer, but character and advertising were of great importance. Where he is from here is unknown. He has already tried other teams who have no interest and disagree after the contract signed by Mariners less than what he wanted.
He did not train, and he's going to want to think about football skills – and the longer life of sport – it's bad enough to accept the cheapest wages.