Hello everyone, I have a question regarding targeted training. When climbing a certain hill on my local ride, my heart rate used to hit 190. My max heart rate is 195 (47 yo). Now, I can climb the hill with my heart rate only hitting 180, but my breathing is still very heavy and labored. Do I need to target VO2 max intervals to try to mitigate this, or is it natural and the heart rate always responds to training better than the lungs?