A Physiologist’s Initial Take on the CVAC Pod

The two physiologists who run the Science of Sports website linked to my first post on the CVAC “egg” device.  The Science of Sports is run by two physiologists, Ross Tucker and Jonathan Dugas.  They have a Facebook page and they posted my earlier entry, “The Egg Conundrum,” on their Wall.  Both Tucker and Dugas contributed to the discussion in the Comments section on their wall.  You can find all the comments in their entirety here.

I copied and pasted some of the relevant contributions below:

1) This is their take on the difference between the CVAC unit and hypobaric/hyperbaric chambers:

2) In my follow-up post to “The Egg Conundrum” I wrote about the biological passport and how it’s been implemented as a far more advanced anti-doping measure in cycling.  The biological passport looks at the long-term blood profile of an athlete and examines critical blood values (including the hemoglobin level), in order to detect doping.  Below is their response to how the biological passport can be used to determine whether or not an athlete’s use of the CVAC pod device constitutes unfair advantage.

They’ve provided more insightful analysis on the central question of how this device can be tested and how the CVAC pod device is different from the hypobaric/hyperbaric chambers.

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I play favorites with Juan Martin Del Potro, Rafael Nadal, Roger Federer, David Ferrer, Feliciano Lopez, Gilles Simon and the long line of mercurial talent that drives me to despair in front of the screen at odd hours during the week.
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5 Responses to A Physiologist’s Initial Take on the CVAC Pod

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  3. Joe Reynolds MD (Dr.Joe) says:

    A true hyperbaric chamber using 100 % oxygen would seem to be unfair for one to use it and the opponent in tennis not to use it. The chamber can increase the “physically dissolved oxygen” in the blood stream to 10 times the amount at sea level in the blood stream with a dive to 2 ATM and 100% Oxygen. This diffuses into the tissues and may remain at a higher level for about 2 hours after the treatment. The work of the heart and lungs would probably be quite less in the person treated with the HBO. If one just doubles the pressure to 2 ATM and uses air the physically dissolved oxygen is just doubled. Still there would be some advantage.

  4. Pingback: The Egg Conundrum | mariposaxprs

  5. kENNY JOHN says:

    STILL DON’T KNOW WHY USTA AND WADA HASN’T BEEN ALL OVER THE CVAC SYSTEM AND AND THEIR NEW HYPERBARIC POD CHAMBER – OR RED BLOOD CELL CHAMBER TO BE BLUNT ABOUT IT. WHY THE HELL ISN’T THIS THE NO. ONE TENNIS CONCERN. E.G. PLAYERS, COACHES, SPORTS COMMENTATORS, ETC. ARE THEY AFRAID TO TREAD THERE? OR ARE THEY AFRAID OF MAKING WAVES. THIS MACHINE IS “AGAINST THE SPIRIT OF THE SPORT” AND TENNIS IS TOO GREAT OF A SPORT FOR THIS TO HAPPEN. COME ON BODO, TIGNOR, MCGROGEN, BOLLETTIERI, COURIER, WERTHIEM, AGASSI, SAMPRAS, WILLANDER, BORG, MCENROE, MARTINA NAVRATALOVA, ETC, ETC. OPEN YOUR MOUTHES AND START COMPLAINING ABOUT THE NEW RED BLOOD CELL ENHANCER. WHAT IN THE HELL IS THE MATTER WITH ALL OF YOU??? THE FIRST PLAYER ON THE TOUR TO USE THIS MACHINE, OF COURSE, IS NONE OTHER THAN NOVAK DJOKOVIC. WHO THE HELL DOES HE THINK HE IS?WHAT KIND OF VALUE SYSTEM DOES THIS GUY HAVE. I THINK HE HAS NERVE JUST GOING TO NEW JERSEY AND USING THIS MACHINE. HE DOES’NT HAVE A CONSCIENCE. HE DOESN’T CARE AT ALL WHETHER IT’S LEGAL, OR ILLEGAL (I KNOW THAT IT HAS’NT BEEN DECLARED ILLEGAL YET, BUT HE STILL HAS “BRASS ONES”.) NO ONE IS GOING TO TELL ME THAT THIS MACHINE HASN’T INCREASED HIS ENERGY,STAMINA, FOCUS, AND ENDURANCE. THE REASON NO ONE IS DOING, OR SAYING ANYTHING TO FURTHER THE INVESTIGATION IS BECAUSE OF BEING AFRAID OF MAKING “WAVES IN THE WATER”.IT’S POLITICS, JUST AS EVERYTHING ELSE IN THIS COUNTRY IS.

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