Extender session in one siting or not?

Lets say we are extending for 4h per day. 4X1h sessions.

Is it better to do the session in one siting? like 1h - 10mins break -1h 10mins break - 1h - 10m break - 1h

Or is it better to spread these hours equally through the day? like 1h morning 1hour mid day 1h afternoon 1h night?

I think that you will gain more by doing it as the first example, but you will get gains by the other method too.

thanks for the reply mate.

Any other opinions through personal experiment?