ex-runner wrote:
it's 2018 not 1998 wrote:
I'm saying that when we are healthy, as I am 99.9% of the time and hopefully you are too, we improve through better biomechanical efficiency.
It is absoutely NOT about more red blood cells. That is a complete red herring. Normal blood counts and normal oxygen delivery are essential for cell respiration, whether you are in the shape of your life or not.
What? Biomechanical improvements play their part but have you not read up on cardiovascular adaptations to exercise in the slightest?
Increased vascularisation etc etc. It's all about getting more oxygen to the working muscles.
No, it's not about getting more oxygen to the working muscles, but the right amount. Increased vascularization is another red herring. It increases as we age naturally to maintain, not to increase oxygen delivery.
It's NOT about MORE oxygen delivery, that is dogma, a red herring. Normal oxygen delivery and improved energy efficiency is where your improvement comes from. Maximal oxygen uptake levels are stable not widely variable as the conventional wisdom will have you believe.
Just because everyone goes on about 'aerobic development' doesn't mean they know anything about the subject. It's just something people say.
Stable VO2 max is essential for basic heath. If it really went down significantly when you didn't train, you would be in serious trouble. Stroke volume is what is variable, dependent on th the vagus nerve response to increased plasma volume, but this happens naturally in just a few day or weeks of increased training volume. It doesn't increase VO2 max but it does give more endurance because you can sweat more.
This stuff has been know for decades. It's nothing new.