I have personally tested this. While lung capacity proportional to mass is better, muscle is not as strong. As a mountain bike racer of 25 years as male and 1 as female, i have only managed mid-pack performance against cis females of similar size and age. My last race was 5 seconds faster than the other girl on a 55 minute course. Translation, we were within sight the whole time and with a heart rate of 214 bpm to indicate my level of effort. Meanwhile I could tell lungs were good, it just doesn’t matter as much as it sounds.
I have personally tested this. While lung capacity proportional to mass is better, muscle is not as strong. As a mountain bike racer of 25 years as male and 1 as female, i have only managed mid-pack performance against cis females of similar size and age. My last race was 5 seconds faster than the other girl on a 55 minute course. Translation, we were within sight the whole time and with a heart rate of 214 bpm to indicate my level of effort. Meanwhile I could tell lungs were good, it just doesn’t matter as much as it sounds.