I am sure I will get grilled for this question but I am going for it anyways.
I consider myself to be a "strong" cyclists. I grew up racing BMX and have been riding bikes almost every single day since I was six years old. My legs have been conditioned to pedal. Where I am struggling now is that over the past few years I've adopted riding those big bikes with skinny tires (I think there called road bikes). It's a whole other ball game! My legs are good; there strong. What I am finding now is that it's my respiratory system can't keep up with my legs. I hate to admit this but I smoked in my late teens and early 20's. I am 4 years clean but I am sure I am still working through the consequences of smoking. I constantly find myself out of breath during climbs and hard efforts. To put in perspective I generally ride 100 - 200 miles a week. None of those miles are spent sprinting and doing intervals. I am putting those miles in for my sanity and my love for riding. Yet I find myself wanting to better myself. I don't necessarily want to get faster but I want to improve my V02 threshold so I can push on climbs and maybe dabble in some cyclocross.
So my question is am my cycling performance aka V02 performance suffering because I don't interval train? And if I say incorporate interval training into my cycling twice a week how long will it take for me to start noticing a change? 3 months, 6 months, or even longer? I am in no hurry but just curious to see how this works.
Let the grill fest begin.