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The F.I.T.T Principle . F FrequencyI IntensityT TimeT Type. The F.I.T.T Principle . FrequencyHow often we train per week. The F.I.T.T Principle . IntensityHow hard we train. The F.I.T.T Principle . TimeHow long we train for per session(also known as Duration). The F.I.T.T Principle .
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