Post Number: 1016
|Posted on Saturday, December 13, 2008 - 05:34 pm: |
Here an interesting explanation from a well know website for training consulting :
"Anaerobic Endurance (zone 5b):
Intensity at this level exceeds lactate threshold and is completely anaerobic and stressful to the body.
As a result of short interval high intensity training, lactate threshold increases via improved lactate utilization.
1. What do we need to metabolize lactate ?
2. If Zone 5 is total "anaerobic" than the question is, whether we can use lactate there as an energy source.
3. Why do we see in zone 5 lactate trend increasing ?
4. Could it be that MCT 4 ( monocarboxylate transporter ) rather move lactate out of the working area ?
5. Could it be , that if lactate trend is dropping we may be rather than in a lactate utilization intensity ?
My questions,, your answers .
Post Number: 1017
|Posted on Saturday, December 13, 2008 - 05:36 pm: |
From the same web site :
" LSD (long slow distance) or basic endurance training (zone 1-2):
This speed is for long endurance training and base building. Most long endurance training sessions are done in this submaximal heart rate zone. Athletes can build durability, improve aerobic fitness and improve technique or efficiency of movement.
The ability to sustain submaximal workloads for an extended period of time is a result of an increase in oxygen exchange and supply to the muscles due to an increase in capillaries as well as an increase in mitochondria (aka the respiratory power house of the muscle cell). This increase in mitochondria allows the body to process more fatty acids for fuel utilization thus having a glucose-sparing effect. Slow twitch endurance muscle fibers increase in numbers, become stronger and more capable to produce sustained energy at a lower caloric cost
Post Number: 10
|Posted on Monday, December 15, 2008 - 06:14 am: |
Am in misinterpreting what this is saying? It sounds like they are saying that the lower caloric cost is because of an increased use of ffa due to increased mitochondria present. Yet I'd think that the lower caloric cost would be due to the body's higher efficiency and possibly the weight or specifically fat loss through this training style, thus less caloric expenditure would be required to complete the same intensity of workout. Thoughts?