article_snippet: Usain Bolt posted the video of Usain Bolt gruelling gym session on Usain Bolt Instagram page and showed an impressive range of core and arm strength.
article_snippet: Usain Bolt showed how Usain Bolt core and upper body strength during the gruelling training schedule .
highlights_snippet: Usain Bolt showcased Usain Bolt gruelling gym workout in Usain Bolt Instagram video .
  