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Found in another forum. Interesting but not convinced....(6 posts)

Found in another forum. Interesting but not convinced....Bruno S
Jan 13, 2002 7:14 PM
Excerpt from a recent article on why low intensity aerobics are so important in the base phase. The analogy of capillaries being like balloons is provocative. "Here's what you are trying to accomplish during Base. First, you will increase your residual fitness through strict progression of low intensity aerobic training. This will be accomplished by keeping your heartrates in a very narrow, low-pressure range through an eight week period. At the low pressures you will maintain during base, capillaries will push into new tissues; increasing the vascular network and thereby increasing the capacity to deliver oxygen to the muscles. These gains in vascular density proportionately affect VO2 max. Capillaries are extremely delicate physical entities, almost microscopic in size, at the end of the oxygen supply system. Like a balloon, a capillary will grow under low pressure, but will rupture under the stress of a high-pressure burst, ending its growth cycle and beginning a recovery cycle. That's why it is critical to remain at low pressure throughout the cycle and not interrupt the progress. Great gains in residual fitness can be made during this phase.
Me neither.Leisure
Jan 14, 2002 2:02 AM
Without empirical studies or references this could easily be read as a load of pseudoscience. If your capillaries burst everytime you pushed yourself at high-intensity none of us athletic-types would be alive. Or perhaps the balloon analogy is a bit too oversimplifying, and the exact mechanism for capillary growth is more obtuse.
re: Bursting capillariesguido
Jan 15, 2002 11:13 AM
That's a graphic way of putting it.

Do weightlifters burst their capillaries? Cycling trains the slow twitch muscle fibers, the long, endurance fibers. But really intense muscle contractions use the fast twitch fibers, the ones that get big in weightlifting. They'd be the ones bursting capillaries, wouldn't they?

Anyway, most roadies can't go out riding and not eventually hit a hill, and ya just gotta do whatever it takes to get up that hill. The heartrate is gonna go up, and the capillaries are gonna burst. Ya can't win.
interestingDog
Jan 15, 2002 3:03 PM
My coach has restricted my to sub 148 bpm (187 max, 168 AT) for the last 3 months.

I've read that another coach similarly restricted his riders, and stated that "even one sprint during base training could ruin all the base training."

That sounded really stupid to me, and I assumed the coach said that just for emphasis, and so the riders would not disobey.

But, if there is something to this, I'd like to know for certain. Anyone?

Dog
Top secret info. Only for coaches?Bruno S
Jan 15, 2002 9:50 PM
I found the post (under the title "Building A Solid Base") here:

http://www.trainingbible.com/elboardo/

I have been keeping an eye but not even Mr. Friel has replied. Its strange since as a members only board all topics are answered by the moderators.
updateDog
Jan 16, 2002 7:01 AM
Building a Solid Base - 1/11/2002 - BRK
Message Text:
Excerpt from a recent article on why low intensity aerobics are so important in the base phase. The analogy of capillaries being like balloons is provocative. "Here's what you are trying to accomplish during Base. First, you will increase your residual fitness through strict progression of low intensity aerobic training. This will be accomplished by keeping your heartrates in a very narrow, low-pressure range through an eight week period. At the low pressures you will maintain during base, capillaries will push into new tissues; increasing the vascular network and thereby increasing the capacity to deliver oxygen to the muscles. These gains in vascular density proportionately affect VO2 max. Capillaries are extremely delicate physical entities, almost microscopic in size, at the end of the oxygen supply system. Like a balloon, a capillary will grow under low pressure, but will rupture under the stress of a high-pressure burst, ending its growth cycle and beginning a recovery cycle. That's why it is critical to remain at low pressure throughout the cycle and not interrupt the progress. Great gains in residual fitness can be made during this phase.
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TB.com - Any Comments? - 1/15/2002 - BRK
Message Text:
Appreciate any feedback or validation on this theory that newly devoloping capillaries can be ruptured during early growth phase.
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Re: TB.com - Any Comments? - 1/16/2002 - Joe Friel
Message Text:
Interesting theory. Needs evidence.