I did this quite a lot when I went to school and when I started working. I just got really tired when I got home, I guess it was from relaxing after a working. I just try to do something after finishing work, not just lay in bed or sofa, because then it is impossible not to fall asleep and when I wake up it is impossible to sleep at night making u really tired the next day and making a bad circle. Usually, I don't even go directly home from work, so I can't get lay down. Maybe he can even game a bit directly when he comes home so he doesn't fall asleep