Why does depression make it so people have no energy?

Same...I feel sick and disgusted everytime I've to leave my room... It's like I'm forced to do them things that normal people do.. Being depressed is also making me lazy and draining all of my energy.. I tried so hard to fix myself after i let the darkness hold me, I made friends with my Demons(depression,anxiety, loneliness...) i didn't know that giving up on society is gonna lead me to an endless path of darkness... I really no longer see fun in things that i used to enjoy, like there's no point in making friends or being in love with someone, i killed all the beautiful things in me in the last 3 years..

I believe it has something to do with neurotransmitter and hormonal imbalance, the reason that medications don't work for a lot of people is that they need to get all of them in balance.

I would assume it's because we lack energy to think positively. We tend to shut ourself away from people and linger in our recurring thoughts.

Yeah. It really does affect academic performance.

Cus you're depressed and shit. It's not called depression for nothing.

Because it's exhausting just doing the basics, when it's bad for me I can't do much else.

depression is both psychological and physiological (somatic) i lost my appetite, sleep and mobility. i was just a mess :(