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There are several terms in training articles that get thrown around in confusing ways: aerobic threshold, lactate threshold, anaerobic threshold, aerobic capacity, VO2 Max, anaerobic capacity, and functional threshold power or pace. Many of these terms have definitions that are quite similar to each other, with minute differences that matter in the field of sports science, but are basically equivalent for athletes training. These terms all fit into three main categories that are important for us to understand as endurance athletes.

Aerobic threshold (AeT)

The aerobic threshold is defined as the intensity of exercise at which lactate levels in the blood begin to rise from their baseline. Lactate accumulation indicates that the metabolic pathways that are fueling our muscles with energy have begun to shift to a combination of aerobic and anaerobic mechanisms, and if the intensity that we are working at stays the same, or increases, lactate will continue to build. This is in effect an endurance limiter. Aerobic capacity is essentially the same term – it refers to the amount of work that can be performed before the athlete reaches their AeT.

Lactate Threshold (LT)

Lactate Threshold is the level of intensity at which lactate in the blood reaches 4 millimoles/liter. This is a tiny amount and is something that requires a blood test during exercise in a lab to determine. The more useful definition for athletes is that it is the intensity at which lactate production exceeds its removal. This is also the defining line above which, exercise can only be sustained at that intensity for short periods of time before fatigue and slowing set in. Consider this the upper-end limit to endurance. While the definitions are slightly different, this is essentially the same thing as Anaerobic Threshold (AnT) anaerobic capacity, and functional threshold. They all refer to the point at which the metabolic pathways switch to a primarily anaerobic pathway that burns glycogen (carbohydrates), and the ability to sustain that intensity will be limited.

VO2 Max

VO2 Max refers to the maximum amount of oxygen that the body can utilize for energy during an all-out effort that is well above their AnT. Theoretically, the better your body is at delivering oxygen to where it needs to go, and the better adapted your muscle cells are to exercise, the more oxygen they will be able to utilize to make ATP (energy) and the more energy they will have to do work. Sounds simple enough right? VO2 Max has been a big focus in endurance sports for a long time, partly because it is easily quantifiable. However, ask elite coaches, such as those at Uphill Athlete, and they will tell you that VO2 Max doesn’t correlate very well to performance, and seems largely determined by genetics. Athletes for decades spent considerable effort training to increase their VO2 max, but recent studies suggest that that time would be better spent increasing the aerobic threshold.

Why do these terms matter? One dispels a popular myth related to training (VO2 Max), while the other two are the categories where we as athletes have the greatest abilities to affect our metabolic and motor pathways to achieve better performance. The balance of aerobic threshold and lactate threshold training that we do as we prepare for a large climb will determine how we perform. We’ll be diving into these two topics in more depth in the coming weeks so stay tuned!

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There are several great resources that provide a lot more information on these topics. For this article, we pulled from Joe Friel’s blog and from the recent book, Training for the Uphill Athlete, from the folks at Uphill Athlete. We can’t recommend the book enough if you are serious about training for endurance mountain sports!

Comments? Questions? Share your thoughts here in the comments!

Aerobic Base Training Aerobic Base Training is the foundation that the subsequent layers of your training will be built on. The first of the three standard phases of training, the goals of aerobic training are to increase muscle efficiency and endurance. During this building phase, your body develops its capillary network, delivering more blood (and oxygen) to your muscle fibers, minimizing lactate production, maximizing lactate disposal, and increasing mitochondrial density (which produces ATP to fuel your muscles).

Aerobic base training was initially pioneered by New Zealand running coach Arthur Lydiard1. In the 1960 and 1964 Olympic games, three of the athletes he coached combined for 6 medals, dominating the distance events. The world took notice, and soon some form of his theory of aerobic base training had become commonplace in nearly all endurance events. There were many misconceptions to his theory though that endured: namely that aerobic training involves lots of long slow miles, and nothing else. In reality, Lydiard typically included three workouts into his athletes base periods: long runs, shorter steady state runs at an increased effort, and fartlek type interval workouts.

Each workout in the period accomplishes a specific purpose, with the overall goal being to maximize the aerobic energy system before moving on to anaerobic training. While long workouts accomplish the goals that we usually think of such as increasing blood flow and muscular efficiency, the steady state workout is designed to increase the aerobic threshold (the level of effort the body can exert while maintaining aerobic metabolism and not producing lactic acid), and the fartlek workout is designed to mix up the pace, letting the legs turn over more quickly to stimulate the muscle fibers in a different way and develop the neuromuscular system as well.

As mountaineers, these same principles and goals apply. During our base phase, our goal is to maximize the aerobic energy system, and so long workouts, shorter steady state workouts, and fartlek intervals will all help to build that strong foundation that the rest of our training will come to rest on. Into that mix, we can also add endurance strength (light weights, but lots of reps) and core strength workouts to start to build the well rounded fitness that is so essential for our sport! During the base building phase, higher intensity workouts should still be done at a moderate pace however, perhaps around 80-85% of your max heart rate, rather than a 100% all our effort. This pace will continue to develop your slow twitch muscle fibers while beginning to develop your fast twitch fibers as well. This has the added benefit of reducing the chance that you get injured as you move into more intense workouts during later phases of training.

Mt. Rainier may not be the Olympics, but we can certainly train like an Olympian, and that foundation laid now, will provide the support for a great climb on your next big objective!

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(1: http://runnersconnect.net/coach-corner/base-training-running/)

Questions? Comments? Share your thoughts here on the RMI Blog!

On The Map

The vast majority of climbers that come climb Mt. Rainier with us live in decidedly unmountainous places. As a former fellow flatlander, I can sympathize. There is actually a surprising amount of training literature out there targeted at folks living in mountain towns (think gaining 3,000 feet twice a week), and recently, folks training for high end alpinism (think Steve House). But when it comes to “Joe Climber” living in Kansas hoping to be strong on Denali or Mt. Rainier, in my experience there is a real gap in available resources. I don’t claim to be an expert on the subject, but I certainly have strong opinions as to how best to go about this type of training, based on my own personal experience. And so, without further ado, I present to you the 4 principles of the flatlander’s guide to mountaineering training:

Diversify your training. Face it. You live in the Midwest. The terrain that directly simulates your mountaineering objective does not exist in your backyard. Therefore no single exercise or activity can adequately prepare you for that objective, which means that you must pursue a wide variety of training activities. If all “Joe Climber” does to train for his Rainier climb is run, he will be in great shape for running. But he will not be in great shape for Rainier. Which leads me to the second principle...

Emphasize strength training. When we say you need to be strong for the mountains, we mean that quite literally. Carrying big loads uphill and downhill day after day requires a significant amount of muscle recruitment, and you can’t recruit it if it’s not there. The majority of my time training in the flatlands is actually spent in the gym, performing exercises that emphasize muscular and core strength. I’ll save my personal lifting program for another article, but I’m a big believer in free weights and olympic lifting, rather than machines. Performing a squat using perfect technique not only builds strength in your butt, quads, and calves, but also strengthens your core/low back and improves your balance. No single machine can do all this, and machines can even lead to injury by over-strengthening certain muscle groups at the expense of others.

When it comes to cardio, think long duration/low intensity. As a mountaineer, we work best in our aerobic zone. This is why we pressure breathe, rest step, and do everything we can to conserve energy in the mountains. So when we train, it makes sense to maximize our output in what Steve House and Scott Johnston refer to as “Zone 1.” To quote their book, Training for the New Alpinism, “Improving [Zone 1 fitness] will pay bigger dividends in alpine climbing than time spent improving any other quality because it allows you to sustain higher submaximal climbing speeds for longer times” (58). And to reiterate my first principle, mix it up! I’ll run, I’ll swim, I’ll bike, I’ll run up stadium stairs if available. But when I do, I’ll shoot to be moving for at least 90 minutes.

The best defense against altitude is hyper-attentive self care before and during the trip. Altitude weighs heavily on most climbers’ minds pre-trip (particularly those climbers living in the flatlands), and for good reason: more than any other aspect of a mountaineering trip, how your body responds to altitude is the one factor you can’t fully control. But you can stack the odds heavily in your favor. Before the trip leaves, be sure you are on a consistent and complete sleep schedule. Be sure you are eating well. I’ve talked to guides who swear by airborne, or probiotics. Everyone’s a little different, but if you find a supplement that consistently keeps you healthy, go with it. On the trip itself, dealing with altitude becomes even more straightforward. Never let yourself get too cold. Force yourself to eat. Force yourself to drink. Force yourself to breathe. The climbers that take these four concepts to heart, nine times out of ten, are the climbers who summit.

So what do you do with these principles? Well, you construct a training schedule. My schedule, as a college student in Massachusetts training for Denali, looked something like this:

Monday: AM-swim PM-lift

Tuesday: PM-water jug hill repeats

Wednesday: PM-circuit training/lift

Thursday: PM-long run (90 min+)

Friday: AM-swim PM-lift

Saturday: PM-bike

Sunday: Rest

There are a lot of ways to construct a solid training schedule. I was limited that year by classes, other obligations, and going rock and ice climbing whenever I got the chance. But keeping in mind the four principles, I was able to train my way into comfort on Denali, all while living in a flat location. Now, train hard, rest hard, and I’ll see you in the mountains!

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Pepper Dee grew up in Missouri, but found his love for the mountains at an early age. Based out of Bozeman, he guides trips on Mt. Rainier, Denali, and abroad to Aconcagua. A long time flatlander, Pepper knows what it takes to prepare for a big climb without the luxury of mountains in his backyard.

Questions? Comments? Share your thoughts here on the RMI Blog!

It was another breathless, warm morning on the Ecuadorian countryside. Our beautiful hacienda was situated perfectly in a giant valley which runs directly from our dining room window unabated for 7000’ vertical feet straight to the summit.   

Chimborazo, the farthest point from the center of the earth and closest to the sun, was mostly displaying her majesty as we sipped coffee and ate our eggs. As the morning wore on, she hid herself from view and we loaded the magic bus ready to take us to the Chimborazo trailhead.  By 1:30 all our packs were packed, and it was off to high camp at 17,500 feet.

At this altitude nothing feels perfect, unzipping your trousers just to take a pee can leave you winded. But our seemingly invincible team has again handled things with grace under pressure and is doing well up here.   Once again, the Ecuadorians have done it right, providing a giant dome tent for our lounging pleasure.

But don’t get too comfy bloglandia, the alarm is set for a mere four hour from not.  It is then we will have our final test?  

The is rest well with a positive psych ! Wish us well!  

RMI Guides Adam Knoff, Hannah Smith and Team