Is it normal that the legs are always the bottleneck?
My legs always get tired even though
- My heartrate is always calm when cycling
- I never get out of breath, except for sprints.
- I don't sweat much
But my legs still feel tired quickly. I'm not grinding the gears, I know how that works that heavy gear = hard for the muscles and low gear = also inefficient but shows differently, more cardio heavy.
If I'm just leasurely riding then my RPM is about 60, paired with very gentle pedal force so that means I'm not grinding it.
Normal: closer to 90RPM
Sprint: higher than 90rpm ofcourse
But is it weird that I rarely ever get out of breath and that my legs seem to be the bottleneck in my riding performance?