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Over the next while, I am going be introducing some concepts that Scott Molina and I have been discussing over the last month. The concept of aerobic threshold has been around for a quite a long time. However, I think that many of the magazines and training plans have lost focus on this essential concept for endurance performance. I'd encourage you to read these sections and ensure that you understand exactly what I am talking about. There is something quite important here for IM performance. |
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What is AT?
AT can mean a lot of things. Let me run through them. AntTib -- Anterior Tibialis -- Flex your foot upwards with your hand on the outside of the top of your shin. Your AntTib is the muscle that is under your hand. ATen -- Achilles Tendon -- Back of your leg just above your heel. When your foot rocks side to side or if you calf muscles are tight, this important tendon can get overloaded. Fortunately, it is easy to correct. Happy to report that our chronic sufferers are all on the mend with new pedals. LT -- Incorrectly called anaerobic threshold. Always talk about LT, don't talk about anaerobic threshold. Confusing, especially as I will be speaking about AeT in the months to come. AeT -- Aerobic Threshold -- our topic for today. Aerobic Threshold Technical definition is the first material increase in lactate levels under training load (2 mmol/L -- I think). My bet is that this level of intensity is variable according to athlete fitness. A highly trained endurance athlete is going to have a very good pace at this intensity. Scott tells me that Mark Allen could absolutely punish other pros at a conversational pace (for him). This is an example of a high degree of fitness at aerobic threshold. The Swedes are another example -- they talk about easy pace -- it is easy for them because they have such huge aerobic horsepower. Even some 'fast' athletes have this for a limiter -- true endurance elites -- marathoners, top IMers, distance swimmers -- have phenomenal aerobic threshold endurance. At the other end, are athletes that have very little pace range -- in other words they can only go slow, or fast (and when going fast they need extensive recoveries -- even 60 mins of Zn 3 can destroy them). This is where most of us start when we are new to a sport or endurance training -- think about when you started running or swimming. Once you have a range of different swim, bike and run gears -- I believe -- that this is a sign of improving aerobic fitness. Low heart rate, good pace/power, normal to high RPE -- this is a sign of fitness. I am going to be studying this concept more.
For more information, pick up a copy of John Hellemans training intensity handbook. The handbook explains the aerobic and lactate threshold in detail, how to find your own individual training intensity zones and the reasoning behind it. Available from Active Health QE 2 for US$20 which includes postage.
Steady pace is, roughly, Zn 2 for most of us. My experience/theory is that aerobic threshold is going to lie somewhere in Zn 2 for the majority of athletes. I believe that it is where you sense your breathing change, but you do not experience the lactate burning (associated with threshold) or breathlessness (associated with mod-hard & tempo). I believe that these physiological tips are a good sign of where your AeT lies. I will be going into the lab to test my theories on myself. In Joe Friel's Bibles, he talks about the superiority of Zn 2 over Zn 3 for base endurance training -- I believe that this is what we are talking about here. Endurance adaptations in trained athletes happen best at AeT. When we do lots of volume at higher intensities, we tend to generate higher fatigue relative to the aerobic adaptations. It comes back to Scott's point about "how we want to make ourselves tired" and is the core of why you shouldn't do much high lactate work. That "Steady Ride" that I prescribe to my athletes is the core of every Ironman's training. Now, you need to be quite fit to handle a lot of steady. It sounds easy but heading out and riding three or four hours on AeT is one of the toughest sessions that you can do. That is why it is recommended only the strongest athletes. Most of us will need to start with lots of Zn 1 (easy to steady pace).
Where does steady lie in the pool? Based on my training, it probably lies around T(1)+ 5s to 10s per 100 pace. I know that I can swim about T(1)+7s quite comfortably for a long time -- after about an hour, it would get tougher. As a reminder, the short intervals and high lactate work that many American masters coaches (and athletes) prefer is most likely sub-optimal for developing your endurance at AeT. I have made my greatest gains in swimming from focusing on threshold and sub-threshold endurance and strength work. Moderate amounts of faster work is beneficial, but you rarely want to be generating very high levels of lactate. For those of you who are 60 min IM swimmers or slower -- I would say very rarely. Why? Because technique is near impossible for a novice swimmer to hold under high lactate levels (be honest with yourself!). Absolutely perfect swimming at steady to mod-hard intensities is best. Until you are sub-1:15 -- absolutely perfect easy paced swimming with moderate amounts of steady would be the way to go. If you think back over your swimming careers, then you will find that you have made the greatest gains when you were very consistent and followed the above guidelines. T(1) pace is average pace per 100 for a 1000m TT -- T(2) pace would likely prove to be slightly faster than AeT for most of us. If the bottom falls out of your pace when you do a T(2) test then that would be a sign that your AeT endurance is weak (same thing when you pace plummets from 5K to 10K to 21.1K running races). Swim Cords Q -- Swim cords: What type of speed and rep should I be doing the drills. Currently, I do them slowly, 1x25, just like the weight protocol A -- Slowly with a focus on the negative component of the exercise is best -- you want to be doing three sets of half pulls and forward rotations (each). Reps should be to fatigue -- once you can do 3x30 on 45s RI for each of these two exercises then you can add in full pulls. A nice way to add full pulls is to alternate a half pull rep with a full pull rep (call that one cycle). Forward rotations stay the same.
I had my blood tested recently. Full thread is here: http://www.coachgordo.com/cgi-bin/config.pl?read=24335 Basics, since switching to the method of eating that I recommend. My recovery is faster, my good cholesterol is up and my bad cholesterol is down. Note that my current diet has a much higher fat content than my previous 'athlete' diet (no fat, high GI, high processed). There is increasing research supporting the Key Three. The following percentages are valid only for males. Females should not focus on body fat percentages -- you won't be able to avoid comparing yourself to men and you are not men. If you want some data then get your skin folds measured (less emotive, tougher to compare with your pals). Q -- Do you count calories daily? (Im 5'9" 150 ~7% body fat up from 141 lbs/4% in May...ended up injured; don't know if too low of a weight was a factor) I'm racing faster in general, but trying to be body conscious and not let myself turn into a pig. Not quite sure what ideal weight/body fat % is. When on strict paleo, do you use bars/gels on long workouts? A -- I neither weigh myself nor count calories. I use a mirror and how I feel -- if I feel tired or start to look too cut then I bump up my food intake. If you were truly 4% (via hydrostatic weighing) then you were clearly too light. Once you are under 10%, you need to be very careful. Once you are 8% or under, I doubt that there is any benefit from going lighter except for an A race. I find that I train best in the high single figures, but that it HIGHLY personal based on my body structure. I think body weight and percentage body fat completely miss the issue. What matters is the quality of your overall nutrition and whether it enables you to recover fast and have quality training.
1 -- Eliminate processed foods I eat bars and gels during longer workouts -- I would prefer not to but I have found that it is essential if I want to avoid getting too lean. I train 30-35 hours per week. I am sure that if I was 20 or under I could go 100% unprocessed, except for my longest rides. Of course, my years of endurance training mean that I am quite efficient at using fat as a fuel source. I also do very little anaerobic work. Molina on Weight G -- Dude, a lot of my athletes seem to be weight obsessed. What do you think? S -- You have to admit that it is an important component to endurance success, particularly running. However I think that there is more to it than that that. So many athletes have one goal in life -- to get as lean as possible. If that was it then they'd just have a scale at the start line. If we could only put an extra kilo on our quads, now that would be some useful weight.
Get Strong
Some of the questions below take us into the fine-detail of ideal nutrition. Until you have mastered the Key Three then you are best served by focusing on the areas where you will get the most gains. In life, many of us (including me!) make things more complicated than they need to be. Focus on the Key Three and you'll get most of the benefit from your nutrition strategy. That said, I want to share some specific Q&A with you.
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