Being in northern utah I am forced indoors alot. The biggest difference I notice is how much harder I have to push the gears to get the same wattage as outside. For example, I'll do 2x20s going up a pass outside by pedaling as easy as possible. Same workout indoors and I have it in the 53x11 resistance about as high as it goes and i'm barely hitting threshold, my legs get sore and I have trouble making 10 minutes. Does the resistance on the trainer affect wattage? I know I am overheating somewhat despite the fans and open windows but it seems like i have to mash such big gears-I've tried smaller gears with hihger cadence but can only hit FTP at about 120rpm. Any suggestions?