If it’s before a strength training session, I would only do enough to get warmed up.
Weight training is (mostly anaerobic(ie sugar), while cardio is (mostly) aerobic(O2/Fat). So it makes sense to me to use up your sugar so that you can use your fat for the cardio session. [/quote]
thanks for the repsonse but from what i’ve learnt if your heart rate is in the right region ie. 60-70% MHR it wouldnt make a difference when the cardio is done, the energy system used would automatically be the aerobic anyway, regardless of the timing and how much glycogen you have in your muscles/liver. I was wondering more about insulin sensitivity or any other factors that could have an impact.