i started training when i wasn’t working, when i started working again my time got smashed similar to having a kid (which i do have 2) i base it on how i’m feeling if i get too tired i give up training and sleep, always take care of your body. for instance just this morning i was out on my run i was so tired during it, i cut the run short went home and napped on the couch for 20min before needing to get up to lunches made and ready for work and kids for school.
i recently started waking up 30min before i normally do for my runs to get longer runs in, it’s helped but it also takes a toll depending on how i sleep. it’s all going to come down to how your baby is and your wife…… my 1st woke up every hour or 2 hrs and my wife and i took turns taking care of him…. there is no way i could have trained being that sleep deprived, worked a full time job and everything else. at times i could barely stay awake at work…..