I am not new to cycling but am just starting in racing, training and whatnot.
I wanted to concentrate some of my training on some specifics such as intervals, I purchased a home trainer (to be able to do it at nights after works in weekdays, in poor weather, and to benefit from constant conditions (no hills)).
Unlike most trainers, mine (the Elite Qubo Power Fluid) has no resistance setting and manual states resistance should only be changed through gears.
Does this mean that gears only set the resistance and that overall speed is meaningless and that I should only worry during training about my RPMs, my cardio, and overall duration or workout/exercise?
Also, what do those graphs actually mean? (I know it is mostly marketing bullsh*t but it has to mean something):
Thanks and sorry if my question are too silly or if I am posting in the wrong forum (maybe this one is *only* about nutrition and the actual exercises not the tools required to achieve them)...