Y'all ever get in a physical altercation with some dudes that look like that? Those scrawny bastards can fight. They are made of muscle and rice and that's pretty much it.
Maybe...
I don't know what kind of monks they are. Bhuddists practically starve themselves and do no exercise at all. They're pretty frail. Monks in other eastern religions can be exactly the opposite. They train hard every day and can be some really tough characters.
Just to look at the pictures, they look pretty tough to me. They're very wiry, not starved. Look at the chest and shoulders on the guy on top the cat. He's in shape.
