and you were fatigued from your 50-60hour week
Of which I'd wager at least 20 hours is spent sitting around in Compass or CAT or on a bus and not actually doing anything productive. The 60 hour week is a favourite quote, but the whole picture is that the maximum monthly hours are the restricting factor so if you did happen to work a 60 hour week you could look forward to taking it easy for the next three weeks.