Here is some information you need to answer this question:
Cellular respiration equation:
C6H12O6+6O2 -> 6CO2+6H2O
Cellular respiration breaks the glucose (C6H12O6) molecules for energy and new molecules (CO2 and H2O are formed as byproduct).
Overall, there is a release in energy, but also more so of a net increase of energy.
I hope that helps!