[percutaneous]

Perhaps working 50 hour weeks and being well rested would result in faster and more efficient learning than working 80 hours. Yes - you have to do your time, but humans don't learn well sleep deprived.

You could try and force them to work 100, or 160 hours per week and I suspect you'd rapidly find quality of work and learning nosedive.

I think it's worth considering 80 hours is already on the wrong side of that curve.