Hello Robin
Ty for the advice on the sleepiness. In regards to your question, first I would reccommend you not do strength training and cardio in the same session. .., but if you must, do your strength training first and only about 20-25min of cardio afterwards at a low speed. Why ?? because you want to keep the muscle you are building (which we know burns more fat than cardio alone)not lose it. Secondly, until you have upped your carb load you probaly only wanna do 20-30min of cardio anyway. That's assuming you are in Induction phase.
Thirdly, you wanna make sure you are hydrated before working out, and if possible sip on the Emergen-C drinks while doing your cardio. Are you working out on an empty stomach?