Is this a mental thing or is there a genuine reason for why it feels so hard to ride at threshold or above for any length of time if you haven’t do so for a long time?
You always have a threshold, or a best power you could ride at for an hour surely? I see lot of people saying how hard they feel their first weeks of threshold or VO2 is and I’ve tested this earlier in the week myself. I wasn’t fresh necessarily but I said I’ll go and ride for 20 mins at threshold, but my legs and heart didn’t really want to stay there. I ended up doing over 80 minutes non-stop at sweet spot and felt like that wasn’t exactly stressful. Is there some reason why I (and I’m sure many others) find it hard to get the heart rate and legs going at threshold and above? Also tried a VO2 interval last week and just felt totally shut down. Really not used to it - not so much dying, but rather a feeling of being shutdown if that makes sense.
What’s the science say?