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7 Reasons Mountaineers Can't Rely On CrossFit

6/2/2020

 
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High intensity training seems like an amazing shortcut for many mountaineers. If you can get the same results, with much less time commitment, why wouldn't you go down the high intensity route?

Unfortunately, it isn't quite as simple as many of the high intensity advocates make it out to be. This article will explore the flaws in that thinking:

If you are interested in training for mountaineering, you have probably heard the same few statements repeated to you over and over:

  • A mountaineer NEEDS long periods, of low-intensity cardio

  • A mountaineer NEEDS to develop their aerobic base early in their training

  • Aerobic capacity is the most important aspect of fitness for a mountaineer

All of these are true. But do you actually know why?

Well, today, I want to explore this in a little more detail.

Here are seven reasons a mountaineer needs to be emphasising long periods of low-moderate intensity cardio in their training (and can't rely on CrossFit!):

1) It Causes Structural Changes To The Cardiovascular System

Lower intensity aerobic training causes structural adaptations in the cardiovascular system.  

This includes things like:
  • Denser capillary beds in the trained muscles (leading to more efficient oxygen exchange between the blood and muscles)

  • Increased mitochondrial mass (allowing more production of ATP*)

  • Changes to the heart (leading to more blood being able to be pumped around the body)

This is all obviously super important for a mountaineer!

On the other hand, high-intensity training mainly causes 'functional adaptations' which changes the function of pre-existing structures. This is still very important for a mountaineer, but if you are not optimising your structural adaptions, you will never get anywhere near your potential.

*ATP is the fuel which produces energy in for our muscle contractions and just about everything else in the body.

2) Muscle Fibre Conversion

In our body, we have both fast and slow-twitch muscles fibres. Fast-twitch muscle fibres produce quick, explosive movements but fatigue quickly. Slow-twitch muscles fibres cannot produce as much force but are very fatigue resistant.

The makeup of these in the body can be changed to some extent. High-intensity exercise will lead to more fast-twitch muscles fibres. Long periods of lower intensity exercise will lead to more slow-twitch muscle fibres.

Which would you prefer on the mountain?

3) ATP Recycling

The ability of the aerobic energy system to 'recycle' ATP (to produce energy) is one of the most critical factors in endurance performance. 

One of the best ways to improve this is to deplete glycogen (stored carbohydrates) in the slow-twitch muscles fibres. This is best done with long duration, lower intensity training.

High-intensity training can deplete the glycogen, but this is mainly in the fast-twitch muscles fibres (this type of training is too short to have any significant change on the fatigue-resistant slow-twitch fibres).

4) Improved Fat Adaptation

Training long-duration, low-intensity exercise enhances the ability of the body to use fat as a fuel source, at increasingly higher intensities.

This has two big benefits:

  1. The body has HUGE stores of potential energy in fat, so this reduces the reliance on our limited stores of glycogen during exercise

  2. The metabolism of fat does not lead to the production of lactate (which is an excellent thing for a mountaineer!)

While you will never entirely use fat for energy production during exercise, improving this ability can only be beneficial for a mountaineer.

*This process can be enhanced with some dietary manipulation, but we will cover this another time.

5) Connective Tissue Resilience

As a mountaineer, your tendons and ligaments all need to be able to withstand force over long periods of time.

While strength training is probably the best way to do this, long periods of aerobic exercise is also important here.

This exposes the connective tissues to this specific stimulus (i.e. long periods of moving on your feet), causing it to adapt and strengthen. And, as you increase the duration of your cardio, this will be a slight new stimulus and will keep the strengthening process going.

Short duration cardio is just not specific enough here to prepare your connective tissue for long days on the mountain.

6) Mental Strength

Often overlooked, mental strength is incredibly crucial for any mountaineer.

While many might argue some masochist CrossFit workout will help develop mental toughness, there is a bit difference between surviving a workout in a gym for 40 minutes and 'embracing the suck' for 12 hours...

To best prepare for a mountain adventure, you need to train your mind to be comfortable for moving for long periods, over different terrain, in different weather conditions. The more you can do here, the better.

7) Recovery Rates

Recovery between bouts of exercise (e.g. intervals) is greatly affected by your aerobic capacity.

Simply put, the better your recovery, the better you will be able to perform in your higher intensity training.

If you don't have a high enough aerobic capacity, you won't be able to work as hard during your high-intensity sessions, which is effectively shooting yourself in the foot in these sessions.

===

So hopefully you are now aware of just HOW important long duration, lower intensity cardio is for a mountaineer.

While some amount of high intensity training is important in your training, you cannot consider it as a replacement for your low intensity work.

So if you do struggle to fit these sessions into your week, or you would much prefer to spend 40 minutes in a Crossfit Box than 4 hours on a bike, hopefully, this article can be a turning point for you.

Do the right things in your training, and you will be thankful on the mountain. 



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    Rowan is an online personal trainer who specialises in training for hiking and mountaineering. He helps get them fit, strong and resilient so they can conquer every adventure. 

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