I have a full home gym, is it more beneficial to do several little workouts throughout the day than one hour long session?

So, I built this gym, and sods law, dont use it as much as I should.  I really am going to because I am in training for a half marathon now, so the added strength will come in handy.  Dont get me wrong, I have had the odd few workouts.  An hour long here and there, really giving it a go, but always seem to fade out.  My plan is to use it through the day.  I've come to the conclusion that the 'gym message' 45 minutes, 3-4 days a week, is a myth to keep people using going. Is that more beneficial to have 3-5 little 10 minutes sessions throughout the day than one hour long session??  Obviously you cant do that at a normal public gym, hence the reason behind the 45 minute, 3 day a week message. I dont have to go out to use mine. It's in the spare room. I wear my gym clothes all day everyday anyway, so surely it's better, right?? I'm no experts however, so, what do you experts say?

Biologically, I personally think it's a better way to do it.  Metabolically, better all round. I just dont know how to research the science behind it.

Any advice is great, cheers.