No, I'm willing to bet you have plenty of energy. Society has simply deemed that all of it must be spent on being productive for the sake of everyone except yourself.

"If your employees have energy to spend on meaningful activities during their own time, you're leaving money on the table. Squeeze them harder while they are on the clock."

If you have time then try working out and doing sports. It sounds asinine, but I've found that exerting yourself increases your levels of energy in the long term. Even something small, a little bit at a time will be greatly beneficial. Also try doing it with someone else and try having an active social life that will motivate you to go out of the house and stop spending all the evening alone on the couch watching YouTube (which is really detrimental, ask me how I know it).

Like the Romans said "mens sana in corpore sano" (you need a healthy body to have a healthy mind)

I used to think that. Unfortunately, you'll be proven wrong with time. I really did have a lot of energy, when I was younger. I'm now having to be ever smarter with what I have, just to tread water.

Then maybe you're old