Yes, EQ can do that. For some, its great for the off season, for that reason. A small dose of this would help, 300mg.IME, this is the best option for endurance. But you could go other directions. Most steroids will improve endurance. Tren does not though, as it sounds like you have expereinced. If you dont want to get heavier, really any of the DHTs can help. Anavar is great for guys that need to stay in a weight class. It is expensive though. Of course keep test in and use diet and AI to control water.