Athlepedia, The Athletics Wiki

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13 December 2011

12 December 2010

1 October 2008

  • curprev 21:4421:44, 1 October 2008Reaper talk contribs 980 bytes +980 New page: {{stub}} The '''Principle of Progression''' asserts that a gradual and systematic increase of the workload over a period of time will result in improvements in fitness without risk of ...