[Meowmeowz]

i can only advise from a runners perspective as I never get inside a gym

slow aeorobic (easy) running will burn fat, but very very slowly

every now and then, (at least once a week ) if you can up the effort level to short bursts of anaerobic activity where you use energy from the muscles (glycogen) rather than fat stores, you will raise metabolic burning levels ( least this is how it was explained to me) so when you return to the slower (easier) work you will burn fat more rapidly