I have the Horizon EX-78 Elliptical and is there a way to turn an internal setting down to make the resistance easier. Even on the lowest settings it is difficult (and I'm very much in shape)? I have looked through the on-line manual and it doesn't mention anything, but I thought when I was originally putting it together there was an internal setting that you could make harder, but I can't seem to find it to make an adjustment. Please advise, Thanks.