I just got an elite suito. (1st smart trainer) when I have tried to do workouts in ERG mode, I seem to fail everyone. It is like I am riding through sand and my legs feel like they start to burn within the first 10% of the interval. (the wattage is pulling from my PM and will be in the range) however if I just put the trainer on resistance mode and set it to a number, I am able to complete workouts. Is this something with my trainer or will my legs eventually be able to finish sets in ERG mode?