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Training during the week to build up fitness/strength. Long ride at the weekends to build stamina.
Just wondering it an extended commute each side of work can be used to train effectively or not.
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an extended commute each side of work can be used to train effectively
It absolutely can. As @skinny says, especially in terms of building CTL. Adding an hour of upper z2/lower z3 each day will do good things for general fitness, without taking too much out of your legs.
Does what work? What are you trying to achieve?