What I am going to write about today is not a general specific fitness variable e.g. Strength or Endurance. I am going to write about the ESD which is a very important aspect of training to work out for an athlete competing in high level competitions. The ESD will show the percentage of an athlete’s strength potential that was not used in a given attempt of an exercise. This I hope will enable you to work-out where you are weak and help you plan to further progress to your athletic performance.

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