system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40K] How much do Space Marines have to eat?

I had this thought while I was cleaning the kitchen, having recently played *Dawn of War.*

Space Marines are nine feet tall and fuckoff massive, with redundant organs and a physique that would make professional bodybuilders vomit with envy, they're frequently engaged in high-intensity physical activity, *and* have to have the strength to carry their own weapons and armour. How much food do they need to eat to sustain that sort of activity level?

And that's before we get into the psykers - the brain alone consumes about 20% of the body's total energy intake, so I imagine that percentage is going to be much higher for them. Do they need more food than your "rank and file" marine?
gpt
Just one thing, when switched on, the power armour wil not “feel” heavy. Quite the opposite, in fact, it augments the wearer’s already ludicrous strength. It’s basically like wearing a tracksuit.

It means even though their outrageously large weapons are indeed heavy, much of that mass is actually being supported by the armour itself.

There have been a few scenes where the fusion reactor in their backpack has been damaged. They can still move when the power’s out, but it’s a lot more cumbersome.

The suits will also incorporate intravenous injectors for nourishment, so they can have a snack without having to stop during a busy day.