Endurance adaptations on 20' per day
Great study below. Authors' conclusion includes:
"two very diverse forms of training induced remarkably similar changes in exercise capacity and selected muscle adaptations that are related to exercise tolerance. Given the markedly lower training volume in the SIT group, our results suggest that intense interval training is indeed a time-efficient strategy to induce rapid muscle and performance adaptations comparable to traditional endurance training."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1995688/?tool=pubmed
Not to suggest dropping the IM plan any time soon, but certainly significant implications for those of us who occasionally find ourselves with 'only' 20-30 minutes to train in a given day. I'm thinking chronic business travelers, busy moms, on-call professions like docs and firefighters...
Comments
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2375570/
These results look applicable to a 1 hour TT cycling, so given your Olympic focus this year, Mike, it's good news for you. For HIM and even more so IM athletes, I believe that we'd need to build some far onto the fast for another six weeks after this "Get Faster" type plan. I can't see toeing the line at IM Canada in three weeks without a few 5 hour rides and/or some typical EN weekend rides. To say nothing of a few 2-2.3 hour runs. Anyone want to volunteer to do an IM on 20-30 minutes a day of intense training only so we can study this?
Al, et al, I'd bet you'd have to race at a lower percentage of your FTP if you did EXCLUSIVELY this kind of work, but if this kind of work bumps your VO2/FTP up significantly, it could still be a worthwhile tradeoff. I may be willing to do the experiment in future years, though I've got a different design I'm working on for 2013.
I do believe that for anybody working on 'get-faster' adaptations (ie. focused on raising their FTP), occasionally substituting a workout like these (either out of necessity or deliberately) should have no adverse effect, and may even have a positive effect. It's a good feeling for those of us who find that life tends to hand them a lot of lemons re: planned 1 hour workouts mid-week...
There's a local athlete won won his AG @ ITU. WorldOly champs while running a max 8 miles a week.
I think that discussions / theories like this are more applicable on the bike, less applicable on the run, especially as the race run distance increases. At some length of race run, durability becomes more and more of an issue. In my experience, durability is best built through running frequency. Volume is the result of frequency and should not be the goal. That and seeking out "durability building" runs. What works best for me is moderate to hard downhill running.
Our own Trent Prough has basically volunteered to try out a version of this for us at IMWI, taking HIM fitness to Madison. I have very few doubts that a strong HIM cyclist (ie, doing our weekday interval work plus the ~3hr ride) could take that bike fitness to an Ironman. A high FTP is a high FTP and a very challenging weekly 3-3.5hr ride is "close enough" to work for a 5-6hrs Ironman cyclist. I suspect that this guy might have some confidence / mental issues as well as some neck, shoulders, back, and ass issues related to going from 3.5hrs to ~6hrs, but the endurance is definitely there.
The potential disconnect between HIM and IM training, however, is the durability build by 2-2.5hrs long runs vs 1:45-2hr long runs. In my experience, that difference will express itself on the IM run.
Rich, what would you guess is the impact of that training delta (1:45 runs vs 2:15 runs in training)? I'm assuming you mean that the athlete who only builds up to 1:45 runs will have a harder time executing the run guidance, and maybe should target a slower target? Or does it just make it harder to run past mile 18-20 regardless of pace? Does the number of 1:30+ runs make any difference?
Just my own experience, but ... I've had successful IM performances (i.e., 2 of my AG wins) on diminished bike and/ or run volume, specifically, shorter than usual long rides and runs. But my absolute best times have come from training incorporating 2-3 runs of 135-145 minutes and at least two six hour rides in the six weeks before the event.
There's also some(obvious) durability value from years of routine riding and running.
Having said all that, I find the longer I do this sport, the higher value I place on judiciously placed short intense sessions, like hard strides, 25/50s all out at the end of a swim session, and powering up steep hills on the bike. I suspect the final taper week ... Days 10-4 before an IM ... Is a good time for that kind of work, in place of easy or long stuff.
Mike,
Anything I gave would be anecdotal, based on what I've seen over the years with athletes and with my own training. A few notes, based on this conversation:
Bottomline, probably the most valuable training events you can have, week after week, year after year, are:
Everything else scheduled for the week can be as hard, easy, long or short as you like. My personal prefference is 40-45' Z3-4 runs and 60-90' > .89 IF rides. B considering that most EN members are / have / will have their sights set on long course triathlon, these two weekly events above will allow you to just turn up the dial a hair and jump right into HIM or IM training when you need to.
As for the run issue, I think run performance is the intersection of Fitness, Pacing, Nutrition and Conditions. Does Jimmy get to run a better Ironman because he has been in that really hard place for 6-8 weeks prior to his race in a few long runs? I agree it helps, but I think that "fatigue" can be met by 2x hard run workouts during the week and a quality session as well. Especially if you consider our long runs pre-race right now are mostly at LRP+30" per mile with a walk break every mile...
most of yall sleepwalk faster than i run though. Still, roi is a topic that is near and dear to me so I felt compelled to chime in.