Re: Tips to increase energy and endurance?
Walter and Mary are right.
Also, frozen vegetables are actually very inexpensive and supposedly are more nutritious than fresh. You can get medleys, spinach, broccoli, brussel sprouts, etc. Not exactly gourmet - but tasty enough with a little seasoning (pepper, salt, garlic salt, some virgin olive oil, cayenne or whatever suits your idiom). Steam in the microwave and throw over some noodles (linguini, spaghetti, or whatever).