I excercise vigorously while I am on the induction and I too, occasionally find myself a little tired faster than before. What I do occasionally when I want to have an intense work out is take one pill of stacker 2. It gives you a boost that will last for at least 2 hours. From whatever literature I read stacker 2 is not bad for you if not taken excessively. So you might want to try that. Otherwise just have a double or a single shot os espresso before your work out. That should also give you a boost.