cynthia23 wrote:That's fascinating, Ze. Have you tested this on a true novice to see if you are really conditioning them? Maybe this is a kind of false effect. You take an already incredibly fit person (that would be you!) who could already do a speedy Skyline, maybe from a lifetime of previous aerobic activity, and then the interval training just gives him a slight edge? Could you really take a novice hiker with low (i.e. average American) level of fitness and train him for Skyline or other long hikes, without any intermediate/longer hikes? It's hard to believe.
I have tried doing interval training (I've tried nearly everything, sob

) but it hasn't seemed to really help for increasing endurance. The thing I hate about hiking is that you have to do so much of it, to do any of it. .
well actually I think on beginners most anything would work, as long as they do it consistently... and I wouldn't push them too hard for a while until that get through a lot of the initial adaptations. I am thinking more of the intermediate - advanced. Sure, the 99.99% elite are going to need more volume and hours of slow & steady to squeeze out the final % increase in economy (like bdog), but that's extreme diminishing returns.
When I mention "intervals" I don't mean the 30s- 1min sort, which largely can be adapted to in a month and have only a small effect afterword. I mean separating out a 20-40 min workout into shorter segments that are still long enough to demand a large amount of oxygen consumption for at least 3-4 minutes (first few minutes will be more anaerobic).
In terms of how they improve long hikes, well they won't do enough directly, but they will help the intermediate hike (30-40 min), and the intermediate will help both the intervals and the long hike. And the long hike will help the long duration and the intermediate.
Think on a log scale (as that's how energy systems are used), a 10 minute interval at a pace you can barely sustain is as "far" away from a 40 minute hike at a pace you can barely sustain for its length, as the 40 minute is from the 2.5 hour uphill hike at the equivalent pace that can be sustained.
Those 3 workouts equally span a good amount of the endurance spectrum, working the anerobic/aerobic complex, pure carb burning aerobic, and fat/carb burning aerobic.
So in a 2.5 hour uphill hike you'll get in say 2500-4500 ft elevation gain, eventually working up to the latter number. that's putting you at about 1/2 the elevation gain of skyline, which would be more than sufficient to get a quick time (of course doing a 4 hr hike would be more optimal).
But that workout still comes down to the intensity / pain you are willing to put in. Certainly you can't do everyworkout at an all out intensity, but ensuring once a week one of those workouts is trying to push faster than the last, you'll be good.
There has to be methodical change in how much you are pushing. One may improve 1% in pace from a previous workout, but if you just go and hike to "feeling", you can't be that accurate. You may go 5% faster, which isn't sustainable and you'll burn out. So the shorter workouts are probably better controlled on a treadmill and /or have hearrtate monitor / gps.
And those shorter workouts can have more slow & steady components of hiking / or any other activity, but only after the important stuff is done.
Of course you can also build conditioning with lots of long and steady without as much pain, but it takes a lot more time. So it's a pain vs time give and take.