Does exercise really make you energetic?

I find that right after exercise, I need the nap. However, the rest of my day is much better. I notice a difference after having been out for a while and my exercise routine has tanked. I am more lethargic throughout the day than I used to be. My recovery is a lot slower too.

Exercise, energetic? Me, personally? Um, no. And I run almost daily.

People that say that probably take many proteins, whey powder, energy supplements and caffeine to increase their motivation that of course they have energy left over. After one mile of walking I'd have energy left over too.

Two cups of coffee, tops. Even the coffee increases my run time (slows me down). I noticed the other day after a race that I actually ran faster without my daily two cups of coffee. Of course, I wanted to hit the rack right after I finished the race, but I ran almost 45 seconds faster than the race from the prior week. I understand that to mean that caffeine excretes fluids from the body during a workout causing the body to work harder than normal. Normal being without the two cups of coffee.

For me it's that my training is done for the day and I can concentrate on other things. I gain weight really easily so one of my daily goals is to train. Once that is done then I'm not concerned about what is going on around lunch or at the end of the duty day because I need to work training in. I do feel much less sluggish in the mornings when I train though.