Zone 2 duration for equal weekly volume, what's best?

[dtjohnnyb]

More zone two than the System training plans

So a few important things to emphasise, a lot of the studies into Z2 being more beneficial have a myriad of factors that mean those studies aren’t necessarily applicable to recreational athletes. Firstly, zone 2 is needed for professionals training a large volume as they can accumulate more training stress without the fatigue of intervals and get benefits that are required to those competing in longer multi-day events. Secondly, zone 2 conducted as x5 1hour sessions is not as beneficial as x2 2…

Here’s a great thread that goes into loads of areas around zone 2, but one specific point that answers your question from @Coach.Andy.T is that 1x 4hr per week is better than 4x 1hr per week