Just wondering what everyone's thoughts are for training for approaches for alpine rock climbs. In the Alps, generally 2 hours is the max approach time for rock climbs, and anything longer most people stay in huts. A common idea is that it's impossible to have too much zone 2 training, but how applicable is this idea in this context? Where days consist of hiking uphill (realistically 90% of routes are 1000m or less elevation gain), then using climbing strength for a number of pitches, then walking down again. What's the point at which spending more time training your aerobic capacity is just a waste of time? (well, with the context of certain goals). Curious for people's takes on this.