Britain's most successful Olympian Sir Chris Hoy told ITV News his "body made the decision" not to compete in the 2014 Glasgow Commonwealth Games.
Sir Chris added that he had "mixed feelings" about not taking part but looked forward to enjoying it as a spectator.
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The decision was met with outrage and anger by UK cities which were on the shortlist for the prestigious award.
Mr Lewis is one of a number of Labour and Tory MPs under investigation by party officials over allegations of inappropriate conduct.
A jury has failed to reach a verdict in Emile Cilliers' trial on charges of attempting to murder his wife by tampering with her parachute.