Podcast 50: Lactate Thresholds, Fartleks ? & more.

A. Link to our server:

http://thegaitguys.libsyn.com/pod-50

B. iTunes link:

https://itunes.apple.com/us/podcast/the-gait-guys-podcast/id559864138

C. Gait Guys online /download store (National Shoe Fit Certification and more !) :

http://store.payloadz.com/results/results.aspx?m=80204

D. other web based Gait Guys lectures:

www.onlinece.com   type in Dr. Waerlop or Dr. Allen,  ”Biomechanics”

________________________________________

* Today’s show notes:

Neuroscience
1. Yes, this is dog: No More Woof aims to translate canine thoughts into human speech
http://www.engadget.com/2013/12/18/no-more-woof-indiegogo-concept-dog-headset/
2. Foot Drop solution ?
4. Gait Talk:
4B . Lactate Threshold Talk
5. Footprints of the gait gods.
6. Fascial NeuroBiology: An explanation for possible manual therapy treatment effects «
http://www.thebodymechanic.ca/2012/10/28/fascial-neurobiology-an-explanation-for-possible-manual-therapy-treatment-effects/
7. National Shoe Fit Certification Program
8. Email:

Hi Guys -
I’m based in the UK. I’ve been running again for a year. I upped to 35 miles per week a month ago (from 25/30) and two weeks later I was injured with an inflamed piriformis muscle (it’s not syndrome). The pain is on my left side. I have a weaker gluteus medius on my left side. I did also put a chainsaw through my right inner thigh near the knee (it fell short of the bone and main artery in the leg) when i was 18 (i am now 40) - which may also have something to do with my question, but maybe not.
When I run, my right foot points outward during my right foot’s swing phase (but it lands straight). I can’t find an answer anywhere: is my outward pointing right foot perhaps the cause of the piriformis inflammation, and if so, how do i correct my foot movement during the swing phase? Help!!!
Weirdly, i have been obsessing about it for months but cannot correct it, and because of that I’ve noticed that a number of other people have from the same problem.

* Disclaimer
10 . How Does Foam Rolling Work? And Why “SMR” Should be Called “SMT” | Bret Contreras
http://bretcontreras.com/how-does-foam-rolling-work-and-why-smr-should-be-called-smt/

11. Behold The ‘Strength Axle’

Speaking of Lactate….

Here’s the bottom line from Professor Brooks: “The world’s best athletes stay competitive by interval training. The intense exercise generates big lactate loads, and the body adapts by building up mitochondria to clear lactic acid quickly. If you use it up (as an energy source), it doesn’t accumulate.”

The job of the athlete is to train in a way that causes the mitochondria to process lactic acid faster and more efficiently.

Lactic acid is a fuel. To improve your capacity to use it as a fuel, you must increase the lactic acid load very high during training. (For more details, see my earlier article:http://www.cbass.com/Lacticacid.htm )

Dr. McGuff is on top of this new thinking. He says that high-intensity intervals and high-intensity strength training both perform the same function: they improve aerobic function by forcing the mitochondria to burn lactic acid more efficiently.

“It is during ‘recovery’ from high intensity exercise that you’re actually getting an increased stimulation of the aerobic system equal to or greater than what you would get from conventional steady-state ‘aerobic’ exercise,” McGuff writes.

“If you have been subjected to proper physical training, you can actually make good use of the lactic acid that is produced. If you are intent on improving your aerobic capacity, it’s important to understand that your aerobic system performs at its highest level when recovering from lactic acidosis,” McGuff adds. “It is also important to understand that since muscle is the basic mechanical system being served by the aerobic system, as muscle strength improves, the necessary support systems (which include the aerobic system) must follow suit.”

To improve the ability of your aerobic system to use lactic acid as a fuel, McGuff says: Lift weights. And then, let your mitochondria take over from there. Get your aerobic benefit on the “drive home from the gym or off to lunch or back to work.”

For McGuff, productive exercise begins and ends with strength trainingTHE key stimulus for strength—and aerobic fitness—is high-intensity muscular effort.

To see and hear Dr. McGuff explain, in 5:50 minutes, just about everything we’ve talked about so far—and why he believes ‘cardio’ really doesn’t exist—visit You Tube: http://www.youtube.com/watch?v=RiHhc7eLpQY  


tumblr_lsf2l7s0Gq1qhko2so1_250.gif
tumblr_lsf2l7s0Gq1qhko2so2_400.jpg

As promised. The info you need to make an educated decision about your training.

What is lactate testing?

Lactate testing is a highly scientific, reliable and accurate way of looking inside the body during exercise to see exactly what’s going on physiologically. At its simplest, lactate (a salt) is a by-product of lactic acid, which is produced during exercise, especially at higher intensities. It’s not necessarily bad or good, but it is of key importance when you are looking to improve as an endurance athlete.

To better understand it, some key points are best made from the start because, all lactate testing is not the same and as a consumer you must be careful to learn the facts before you get tested:

Ø Unless you are getting blood lactate measured through blood samples taken during exercise, you are not getting a true lactate test and you cannot get accurate, valid & complete results.

Ø Lactate is a key player in endurance performance. It is far more important than VO2 max as it is directly related to your ability to perform at race pace.

How does blood lactate testing compare to other testing methods?

Lactate testing removes the guesswork and estimation that many other testing methods use and is based solely on the data that your body provides. Anaerobic threshold prediction tests, max heart-rate tests and heart-rate formulas are all based on guesswork and mathematics and as such don’t always give the most accurate results.

After being lactate tested and comparing the results with those from a heart-rate formula or anaerobic threshold prediction test, it’s not uncommon for some athletes to realize that they’ve been training as much as twenty beats per minute out of their optimal range! Suddenly the athlete can see why they were prone to over or under-training, underperformance and constant disappointment.

Almost always, the athlete improves dramatically following lactate testing as for many this is the first time that they get accurate data that allows their true athletic potential to be realized.

With lactate testing your training zones are based on the exact concentration of lactate at certain exercise intensities and the corresponding heart-rates, power outputs and speeds. These are different for everyone. There is no 85% or fat burning zone, just unique and personal results specific only to you based on sound science.

Regularly performing true lactate tests on athletes allows you to:

1. Monitor the balance of the aerobic and anaerobic systems

2. See how your body has adapted to training

3. Allow your body to tell you what training it needs

4 Develop accurate training parameters to bring about optimal progress for you

How can a lactate test help you?

Lactate testing is vital for the optimal development of an endurance athlete. At its best, it gives you precise heart-rates and training parameters like power output and speeds that are not available from any other method. Furthermore, you learn what training works for you and also learn what doesn’t work. It saves you from repeating mistakes and wasting time. For example, imagine getting 6 weeks in to a 12 week training program and doing a repeat lactate test. Imagine that the test tells you that your aerobic system has not improved sufficiently enough for the planned increase in volume that you had in mind. That’s information that you need to know. You can now change your training plan to reflect what you’ve learned, so that you continue to progress over the next 6 weeks and so that your racing experience is more successful.

What if you hadn’t done the test?

Chances are, you’d have ploughed through the increased mileage, overstressing an already weak and undeveloped aerobic system and ended up getting slower and slower, even over-trained. The race would pass miserably and you’d be left wondering what happened.

Is lactate testing only for elite athletes?

Lactate testing is just as important for the Novice athlete as it is for the Elite athlete. If you are genetically gifted, you can get to high level in endurance sports based on what you were born with. At the elite level, lactate testing helps refine training and improve already high standards. At the Novice or Age Grouper level, genetic talent is limited so you need to maximize what you have.

With blood lactate testing you optimize your training so that every second counts and you maximally develop your potential to its highest possible level.

Can you improve without lactate testing?

Of course you can, but how much guesswork are you willing to involve and how much time do you have to waste? Let’s face it - training is hard work. It’s not always fun so you want to guarantee that what you do works for you optimally. You want to make the most of the time that you have available. You can wander through the various books and pick up new ideas and try things but the reality is that the fastest way forward to peak performance, National team qualification, Hawaii ironman qualification and everything you want from your sport, is through rapid and continual development. That comes from good planning and monitoring the success of your training.

Sifting through the science, so you don’t have to. we are: The Gait Guys

tumblr_lsd6oth5xj1qhko2so1_1280.png
tumblr_lsd6oth5xj1qhko2so2_250.jpg

More Lactate:   

Before we talk about determining blood lactate levels, we need a deeper understanding of the energy producing systems at play, as well as some commonly used terminology.

There are 2 main systems for producing energy in the body, the aerobic system and anaerobic system. There is a 3rd system, the Creatine Phosphate system, which provides energy for very short bursts of a few seconds, or until your creatine phosphate stores are depleted. we will concentrate on the 2 main ones.

The aerobic system or aerobic metabolism, utilizes oxygen, using predominately fats & some carbohydrates for energy along with recycled lactate which is produced at low levels and metabolized efficiently. This is your endurance energy system. You may still have recurring nightmares about this from freshman biology, also known as the Krebs (or Citric Acid) Cycle

Your lactate threshold (LT) is a highly aerobic point where lactate levels in the blood are still low but just starting to reach steady state levels. Your LT is the most efficient effort level that you can sustain for long periods of time without going in to your energy reserves (i.e. glycogen). Beyond this point, you are exceeding your ability to recycle lactic acid back into the Citric Acid Cycle and lactate levels begin to rise; changing local blood pH and affecting local chemical reactions. 

The anaerobic system does not utilize oxygen, using predominantly carbohydrates for energy. An efficient anaerobic system will produce a lot of lactic acid as its by-product. As you know, in large amounts, this causes the burn and fatigue you often feel when working hard.  Thus, your anaerobic threshold (AT) is much more stressful and is therefore only sustainable for shorter periods of time.

What does this mean?

For the endurance athlete, the BALANCE of these two systems must be developed optimally for their chosen event. Performing a lactate test (to be discussed in another post) will help determine the relative contribution of each system. In general, the well-developed endurance athlete will produce very little lactate even at high speeds. Endurance sport athletes, such as cyclists, Ironman athletes, triathletes and top marathon runners need to be highly aerobic, which means that very little lactate is produced even at peak speeds and testing reveals a very flat lactate curve. Most of their energy comes from aerobic sources.

Optimizing lactate threshold development is the main goal of endurance training, and racing at or near LT proves the most efficient route to a solid race day performance.

So, how can you use this information for training? Watch for an upcoming post on Lactate testing.

Yup, we know a thing or two about gait AND training. 

The Gait Guys: Ivo and Shawn



Green bodies: Lactic acid as a fuel source? 

Your body can be greener? We don’t mean being a leprechaun. We mean being a better recycler. Read on…
For  years, we’ve been told that lactic acid is a waste product that burns  and shuts down mus…

Green bodies: Lactic acid as a fuel source?

Your body can be greener? We don’t mean being a leprechaun. We mean being a better recycler. Read on…

For years, we’ve been told that lactic acid is a waste product that burns and shuts down muscles. It’s something athletes and fitness exercisers are urged to avoid. You’re told to work out just below your lactate threshold, where lactic acid begins to accumulate.

Well, some of that is correct, but it seems, most of it is wrong. 

The aerobic and anaerobic energy systems have long been thought to operate as separate and distinct systems. Lactic acid was considered the enemy of aerobic metabolism, with the power in sufficient accumulations to bring it to a halt. But we are smarter than that now…

 UC Berkley integrative biology professor George A. Brooks,  has been studying lactic acid since doing his doctoral dissertation on the subject in the ‘70s. Brooks says the idea that lactic acid is bad and to be avoided “was one of the classic mistakes in the history of science.”

“The understanding now is that muscle cells convert glucose to lactic acid,” Brooks explains. “The lactic acid is taken up and used as a fuel by mitochondria, the energy factories in muscle cells. Mitochondria even have a special transporter protein to move the substance into them.”

So, your ability to recycle lactic acid into the Krebs (or Citric Acid Cycle) reflects a great deal about your aerobic performance and capacity. Aerobic metabolism and anaerobic metabolism, in fact, operate side by side in the mitochondria. The heart, slow-twitch muscle fibers, and breathing muscles actually prefer lactate as a fuel during exercise. In short, lactic acid is a significant energy source, actually a good thing.

Hinting, or perhaps suggesting, how athletes can and are using this revelation, Professor Brooks said in a recent press release: “The world’s best athletes stay competitive by interval training. The intense exercise generates big lactate loads, and the body adapts by building up mitochondria to clear lactic acid quickly. If you use it up [as an energy source], it doesn’t accumulate.”

Too much lactic acid is still bad, however. It causes distress and fatigue during exercise, altering the local pH of the tissues and changing chemical reactions.  In extreme circumstances it can damage muscle cells.

So how can you learn to use lactic acid to your advantage? Stay tuned for the next lactate installment, coming to a Gait Guys Tumblr Blog near you….

Ivo and Shawn