Tanya Skagle wrote:
Given:
1) All sessions of 10 x 400 at mile race pace are higher intensity, shorter duration training sessions than are sessions of 20 x 400 at 3k race pace.
2)"... greater increases in mitochondrial content occur within oxidative muscle fibers with higher intensity, shorter duration training sessions."
Therefore:
Greater increases in mitochondrial content occur within oxidative muscle fibers with sessions of 10 x 400 at mile race pace than with sessions of 20 x 400 at 3k race pace. Q.E.D.
malmo wrote:
That doesn't imply that. It just says simply what the cellular response is to HIT. It does not differentiate between two kinds, and two very close kinds I might add of HIT.
Using your logic trail you could say that 6 x 400 at 800m pace produces even HIGHER cellular responses, when in fact, you don't know unless it is ob severed.
"All Redheads in the gym are women"
"All women were in the swimming pool"
"Therefore, everyone in the swimming pool were redheads"
Paragraph 2) actually read like this (bold what you left off:
The magnitude of the increased mitochondrial content is influenced by the duration and intensity of training sessions. Exercise sessions of longer duration tend to result in greater increases in mitochondrial content (3, 8); however, this relationship is not linear. As the training sessions become longer, the effectiveness of increasing mitochondrial content becomes less. In addition, exercise intensity interacts with the exercise duration. Dudley et al. (8) have shown that greater increases in mitochondrial content occur within oxidative muscle fibers with higher intensity, shorter duration training sessions. Thus, the increases in performance associated with prolonged training sessions may be due in part to adaptations outside those specific to skeletal muscle fibers (i.e. increased mitochondrial content) (3).
Nowhere in that paragraph does it distinguish what the levels of "greater" means, nor does it offer anything about the difference in 10x400 and 20x400, which are TWO KINDS of shorter high intensity training.
Longer training activity results in larger more mitochondria. So does shorter interval sessions. HELLO TO 1950. You don't train for the 800 by running focusing on long training session and you don't train for the marathon by focusing on short intense sessions.
Again, saying that you are running 10x400 or 20x400 for different cellular responses is off focus, unless you can demonstrate it with actual measurable and replicatable observation. You are choosing those different paces for the neuromuscular benefits.