Famous Fartlek Training References. Fartlek running involves varying your pace throughout your run, alternating between fast segments. 6 to 8 x 2 minutes moderately hard with 2 minutes easy;
It challenges your body to adapt to various speeds, conditioning you to become faster over longer distances. Web fartlek training is a kind of running training which involves random variations in speed and intensity, alternating between bursts of sprinting and slower ‘recovery’ jogging. 8 to 12 x 1 minute hard with 1 minute easy;
