>>11916655Yes, its called 2,4-Dinitrophenol, or you can use any other drug that enables uncoupling of oxidative phosphorlyation. Less dangerous alternatives include levothyroxine (thyroid hormone).
"But aren't they weight loss drugs"; yes, because the premise of your question that an ATP depleting drug would be good for muscle growth is wrong. Muscle growth (really; protein growth) can be signalled directly by giving an agent that acts at a nuclear receptor to induce the further transcription of protein, which is what steroid hormones do, or physiologically, you naturally use the body's mechanism for accelerating the protein synthesis process by encouraging protein degradation when you use your muscles to failure.