I don't think it is very healthy, but then again there are over 9000 times as many parents who feed their kids Maccas and plonk them in front of TVs which is over 9000 times worse...

So in summary, "the kid is strong therefore the dad is bad" is a poor argument at best.

Why would he want his kid to be that strong. Tat is just frighting. A kid that age should not be working out like that. He is only five freaking years old. Maybe the kid wants to be strong but that is a terrible sight to see.