One Month to Build Endurance I've got a seven day cycling session in the Alps coming up in about a month. Unfortunately, I've not been great about getting on the bike in the past month (or even the past year, to be honest). From many years of cycling, my fitness is still quite good — enough that I had a great double century last month, before I took a month-long break. But I'm still far short of where I'd like to be, especially in the climbs.

What can I do over the next month to maximize my climbing endurance for this trip? On average, a day will be about 8kft of climbing, with the biggest day being somewhere around 16kft. Should I be focusing on long-distance riding at endurance pace? Hour-long hill repeats? Something else? If you had a month to prepare, what would you do?
I'd say you could go with HIIT (high intensity intervals) on a treadmill.
For example a particular training I like and find helpful is:

6-8 sets of:


1 minute very fast (18km/h for me)
1 minute middle speed (12km/h in my case)
1 minute slow (8-9 km/h)


and no stops in between.

That's a very good yet pretty hard training. Do not more than twice a week.