AP Photo/Rick Bowmer
 
Retirement is imminent for Saint Kitts and Nevis sprinter Kim Collins. And this time he really means it.
 
No, seriously.
 
Just maybe don't etch it in stone yet because he's waffled before. Hanging up the spikes is a difficult decision for the 40-year-old.
 
"But my body is beginning to show signs," Collins said.
 
Collins had his left leg tightly wrapped before the semifinals of the Olympic 100 meters Sunday. Then, just before the race, his toes cramped up. He didn't make it into a final won by you know who _ Usain Bolt.
 
Simply the side effects of age. Collins has been in the sprint game for a long, long time.
 
He raced at the 1996 Atlanta Games, when he didn't advance out of an early round heat captured by Dennis Mitchell, who now coaches Justin Gatlin. Including Rio de Janeiro, Collins has now competed at five Olympics.
 
That total could've been six, but Collins was expelled from the team at the 2012 London Games for leaving to meet his wife. He said at the time he found the athletes village stressful and needed peace and quiet before racing.
 
"At the end of the day, I still love (racing)," said Collins, who has five medals from world outdoors, including gold in the 100 at the 2003 championships.
 
For now, this is his plan: Race through the rest of this season and maybe into the 2017 indoor season. He doesn't plan to compete at the world championships next summer in London. But if his country needs him to be a part of the 4x100, he might make an exception.
 
"I think this is the time to move on," Collins said.
 
With one caveat: He reserves the right to change his mind.