If you choose the wrong kind of fuel, you might run out of energy before the day is over. (kidshealth.org)
Bringing hundreds of millions of people out of energy poverty — and, thus, into higher standards of living — means providing them with access to cheap, plentiful energy. (austinchronicle.com)
I used to run out of energy before I finished my workout; now I train until I run out of time. (biotest.t-nation.com)